Chlorine (Chelsie Dedman)
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Chlorine was discovered in Uppsala, Sweden by C.W. Scheele, though Sir Humphry Davy determined it was an element. Chlorine exists as a pale greenish-yellow gas at room temperature with a melting point of -101°C and boiling point of -34°C. It is found in compounds in nature like salt, carnallite, and sylvite, and is produced by chemical companies for uses like bleach, water purification, and insecticides. Major compounds used are calcium hypochlorite for bleaching, potassium chlorate in fireworks, sodium chloride as table salt, and ethylene dichloride to make polyvinyl chloride.
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Presentation1
Chlorine is a greenish-yellow, nonmetallic element with an atomic number of 17 that was discovered in 1774 by Carl Wihelm Scheele in Uppsala, Sweden. It has a boiling point of -34.6 degrees C, melting point of -100.98 degrees C, and exists as isotopes Cl 35, 36, 37, 38. While it forms many useful compounds, chlorine gas is toxic even in low concentrations and attacks the eyes, throat and lungs.
Iridium (Kelsey Taylor)
Iridium is a transition metal with the symbol Ir and atomic number of 77. It was discovered in 1803 by Smithson Tennant in the residue left after dissolving platinum in acids. Iridium is a solid at room temperature, has the highest melting point of any metal, and is mainly used as a hardening agent in platinum alloys and for equipment requiring high heat resistance. It is found naturally with platinum and osmium and recovered as a byproduct of nickel mining.
Titanium (Trent Sloan)
Reverend William Gregor discovered titanium in 1791 in Cornish beach sands in Germany, but did not name it. A few years later, Klaproth named it titanium after the Titans of Greek mythology. Titanium is the 6th most abundant element on Earth and is found bound to igneous rocks and their derived sediments. It is difficult and costly to extract from rocks. Titanium is used as an alternative to steel in applications where strength and light weight are important, such as in aircraft, spacecraft, and armored vehicles.
Zirconium (Jesse Wynne)
Zirconium is a transition metal that was discovered in 1789 by Martin Klaproth in Germany while studying the compound jargon. It has 40 protons, 51 neutrons, and is a solid grayish element at room temperature. Zirconium is commonly obtained through the Kroll Process, which is the reduction of zirconium chloride with magnesium. Its primary uses include research due to corrosion resistance, as an alloying agent in steel, and in high-performance pumps and valves.
Nickel (Emma Jones)
Nickel was discovered in 1751 by Swedish scientist Axel Fredrik Cronstedt. It gets its name from the German words for "Old Nick", a name for the devil, and "Old Nick's Copper". Nickel is a silvery-white, hard metal that is solid at room temperature and is used primarily in alloys like stainless steel and nickel-based superalloys. Major deposits of nickel ore are located in Ontario, Canada, Australia, Cuba, and Indonesia.
Cadmium (Rebekka Meeks)
Friedrich Stromeyer discovered cadmium in 1817 while studying calamine. Cadmium is a soft, silvery-white metal that occurs naturally as a byproduct of zinc mining. It has many industrial uses, including in nickel-cadmium batteries, solar panels, and nuclear reactors. Cadmium is toxic to humans and environmental exposure can occur through cigarette smoke, coal burning, contaminated food/water, and landfill runoff.
Technetium (Tayler Carter)
Technetium was discovered in 1937 by Italian scientists, though it had been mistakenly reported as discovered earlier. It is a man-made radioactive element produced by bombarding molybdenum with neutrons. Technetium has no stable isotopes and is used as a radioactive tracer in medical diagnostic tests due to its low cost.
Boron (Briana Shandel)
Boron was discovered in France in the early 1800s. It exists in minerals like borax, kernite, and colemanite that are mined in countries like Turkey, Russia, and the US. Boron has many industrial uses including borax for fiberglass, boron carbide for armor, and boron nitride for high temperature equipment. It is a poor conductor but becomes conductive at high temperatures.
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Presentation1
Chlorine is a greenish-yellow, nonmetallic element with an atomic number of 17 that was discovered in 1774 by Carl Wihelm Scheele in Uppsala, Sweden. It has a boiling point of -34.6 degrees C, melting point of -100.98 degrees C, and exists as isotopes Cl 35, 36, 37, 38. While it forms many useful compounds, chlorine gas is toxic even in low concentrations and attacks the eyes, throat and lungs.
Iridium (Kelsey Taylor)
Iridium is a transition metal with the symbol Ir and atomic number of 77. It was discovered in 1803 by Smithson Tennant in the residue left after dissolving platinum in acids. Iridium is a solid at room temperature, has the highest melting point of any metal, and is mainly used as a hardening agent in platinum alloys and for equipment requiring high heat resistance. It is found naturally with platinum and osmium and recovered as a byproduct of nickel mining.
Titanium (Trent Sloan)
Reverend William Gregor discovered titanium in 1791 in Cornish beach sands in Germany, but did not name it. A few years later, Klaproth named it titanium after the Titans of Greek mythology. Titanium is the 6th most abundant element on Earth and is found bound to igneous rocks and their derived sediments. It is difficult and costly to extract from rocks. Titanium is used as an alternative to steel in applications where strength and light weight are important, such as in aircraft, spacecraft, and armored vehicles.
Zirconium (Jesse Wynne)
Zirconium is a transition metal that was discovered in 1789 by Martin Klaproth in Germany while studying the compound jargon. It has 40 protons, 51 neutrons, and is a solid grayish element at room temperature. Zirconium is commonly obtained through the Kroll Process, which is the reduction of zirconium chloride with magnesium. Its primary uses include research due to corrosion resistance, as an alloying agent in steel, and in high-performance pumps and valves.
Nickel (Emma Jones)
Nickel was discovered in 1751 by Swedish scientist Axel Fredrik Cronstedt. It gets its name from the German words for "Old Nick", a name for the devil, and "Old Nick's Copper". Nickel is a silvery-white, hard metal that is solid at room temperature and is used primarily in alloys like stainless steel and nickel-based superalloys. Major deposits of nickel ore are located in Ontario, Canada, Australia, Cuba, and Indonesia.
Cadmium (Rebekka Meeks)
Friedrich Stromeyer discovered cadmium in 1817 while studying calamine. Cadmium is a soft, silvery-white metal that occurs naturally as a byproduct of zinc mining. It has many industrial uses, including in nickel-cadmium batteries, solar panels, and nuclear reactors. Cadmium is toxic to humans and environmental exposure can occur through cigarette smoke, coal burning, contaminated food/water, and landfill runoff.
Technetium (Tayler Carter)
Technetium was discovered in 1937 by Italian scientists, though it had been mistakenly reported as discovered earlier. It is a man-made radioactive element produced by bombarding molybdenum with neutrons. Technetium has no stable isotopes and is used as a radioactive tracer in medical diagnostic tests due to its low cost.
Boron (Briana Shandel)
Boron was discovered in France in the early 1800s. It exists in minerals like borax, kernite, and colemanite that are mined in countries like Turkey, Russia, and the US. Boron has many industrial uses including borax for fiberglass, boron carbide for armor, and boron nitride for high temperature equipment. It is a poor conductor but becomes conductive at high temperatures.
Niobium (Don Willmoth)
Niobium is a shiny grey metal that was first discovered in 1801. It was initially confused with tantalum but was proven to be a separate element in 1844. Niobium is mined primarily from the mineral pyrochlore and is used to strengthen steel and superconducting magnets. Its main applications are in jet engines, MRI machines, eyeglasses, and jewelry due to its hypoallergenic properties. Though not a household name, niobium plays an important but often unseen role in industries like aerospace, medical, and science.
Chlorine (Samuel Boateng)
Chlorine is a greenish-yellow gas that was first isolated in 1774 by Swedish chemist Carl Scheele. It is one of the most abundant elements and is found in compounds like sodium chloride. Sir Humphrey Davy named chlorine in 1810. Chlorine has many uses including water treatment, bleaching, and producing chemicals like hydrochloric acid, plastics, and pharmaceuticals. It is highly reactive and poisonous in its pure gas form.
Barium (Shaun Reynolds)
Barium is a silvery-white metal that is extracted from barite ore. It was discovered in 1774 in Europe and named after the Greek word for heavy. Barium has several applications including use as a getter in vacuum tubes to remove gas, in spark plug wires as an alloy with nickel, and as barium sulfate for drilling mud weighting and medical imaging contrast. Its main properties are a melting point of 727°C, boiling point of 1897°C, and density of 3.51 g/cm3.
Magnesium (Amanda Manning)
Magnesium is the 6th most abundant element in the Earth's crust. It was first isolated in 1808 by Sir Humphry Davy through electrolysis of magnesium oxide. Magnesium is a silvery-white metal that is solid at room temperature but highly flammable at specific temperatures. Its main uses include flash photography, pyrotechnics, and in producing magnesium alloys for aircraft and missiles.
Calcium (Rebecca Barnes)
Sir Humphry Davy discovered calcium in 1808 by electrolyzing lime and mercuric oxide. Calcium is the fifth most abundant element in the Earth's crust and is essential for animal skeletons and plant growth. It has an atomic number of 20, melting point of 839 degrees Celsius, and is commonly found in limestone, eggshells, and mollusk shells.
Ruthenium (Brittany Lewin)
Ruthenium is a rare hard white metal that was discovered in 1827 in Russia. It has a high melting point of 2,250°C and boiling point of 4,150°C. Ruthenium is used in the electronic and chemical industries and for making wear-resistant electrical contacts, jet engine blades, and fountain pens. It is one of the rarest metals on Earth and is found in North and South America and South Africa.
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This document provides information about the element sodium. It discusses that sodium is a soft, silvery-white metal that is highly reactive. It notes that sodium is the sixth most abundant element on Earth and is found in compounds like salt. The document outlines the uses of sodium, including in making soap, glass, and sodium vapor lamps. It also discusses sodium isotopes and their use in medicine and testing oil pipelines.
Helium (David Tucker)
Helium is a colorless, odorless noble gas that was discovered in 1895. It is nonflammable and less dense than air, so it is often used in balloons and blimps. Helium exists as a trace element in the atmosphere but is primarily found trapped within rocks and minerals in the earth's crust. It is obtained commercially as a byproduct of natural gas extraction. Helium has no known compounds and is inert, making it useful for applications like welding, breathing mixtures, and cryogenics where non-reactivity is important.
Neon (Hayley Wayne)
Neon is a colorless, odorless noble gas with an atomic number of 10. It was discovered in 1898 by William Ramsay and Morris Travers. Some key facts about neon are that it is used widely in neon signs and lights, it exists in small percentages in the universe, sun, and Earth's crust, and it has three stable isotopes.
Beryllium (Tara Lay)
Beryllium is a lightweight gray metal that occurs naturally as a component of various minerals. It was first discovered in 1798 by a French chemist who found it present in emeralds and beryl. Beryllium has a high melting point and is used in applications requiring rigidity, stiffness, and heat resistance, such as spacecraft, aircraft, and electronics. It is toxic if inhaled and exposure carries health risks like chronic beryllium disease.
Rubidium (Howard Wood)
Rubidium is a soft, silvery-white metal that was discovered in 1861 by spectroscopic analysis. It ignites spontaneously in water and has a melting point of 312.2K and boiling point of 961K. The most abundant isotope is Rubidium-85. Rubidium is the 23rd most abundant element in the Earth's crust and is found in minerals such as lepidolite. Common compounds include rubidium chloride, hydroxide, and carbonate. Uses include research on batteries and optical glasses, though applications are limited outside research settings.
Zirconium (Haley Post)
Zirconium is a transition metal that was discovered in 1789 within the mineral zircon. It has several stable and one radioactive isotope. While difficult to isolate pure zirconium due to its chemical similarity to hafnium, the Kroll process is commonly used. Zirconium has many applications including use in nuclear reactors due to its resistance to neutron absorption, as an alloy for steel, and in gemstones like cubic zirconia.
Rhodium (Megan Wogan)
Rhodium is a shiny silver-colored metal that was discovered in England in 1803. It has a high melting point of 1966°C and boiling point of 3727°C. Rhodium is very dense, with a density of 12.4 g/cm3, higher than water and steel. It is commonly found with nickel and copper in South America and Canada. Rhodium is primarily used for plating jewelry and coins and alloying with platinum and palladium for hardness.
Radium (Evan Clark)
Radium was discovered in 1898 by Marie Curie in the mineral pitchblende. It is a silvery-white radioactive metal with an atomic number of 88 that occurs naturally in uranium ores. Radium decays into other radioactive elements, emitting alpha, beta, and gamma radiation that can be dangerous to human health if exposed in sufficient amounts. It was historically used to paint watch and clock faces but is no longer used for that purpose due to its radioactivity. Today, radium is used to treat cancer through brachytherapy procedures.
Selenium (Matthew Calme)
Selenium is a non-metallic element discovered in 1817 by Swedish scientist Jöns Jacob Berzelius. It has various industrial uses including in photocopiers, solar cells, and cameras due to its ability to conduct electricity when exposed to light. Selenium is rarely found in nature but can be extracted from copper sulfide and ranks 31st in abundance among elements. It has a melting point of 493.65 K and is also used in dandruff shampoos and is an essential nutrient found in foods like Brazil nuts, fish, and whole grains.
Potassium (Megan Fish)
Potassium is a soft silver metal that was first isolated in 1807 by Sir Humphrey Davy through electrolysis. It makes up 2.4% of the Earth's crust and is found in rocks, minerals, lakes, and seas. Potassium oxidizes quickly in air and is highly reactive, catching fire when exposed to water. It has important industrial uses like in fertilizers and drain cleaners when combined with other elements. Potassium is also essential for human bodily functions and our bodies contain over 100g of it.
Strontium (Keri Nickoson)
Strontium was discovered in 1790 in Scotland and later isolated. It is a solid metal with a silvery color that can change colors during reactions. Strontium is commonly used in fireworks due to its ability to change flame colors and is also found in nuclear bombs and gemstones. While strontium does not exist alone naturally, its salts and compounds have various commercial and industrial uses.
Selenium (Chad Beneker)
Selenium is a chemical element discovered in 1817 by Jons Berzelius in Sweden. It is commonly found in sedimentary rock and often accompanies sulfide minerals or silver, copper, lead, and nickel minerals. Selenium has various properties depending on its form - it is red in powder or crystalline form and gray in its metallic form. It has several industrial and medical uses, including in solar cells, catalysts, and producing medical radioisotopes. Dietary sources of selenium include Brazil nuts, fish, meat, eggs, brewer's yeast, and various seeds.
Cadmium (Jeremy Willett)
Cadmium is a soft, bluish-white metal that was first discovered in 1817 by German chemist Friedrich Strohmeyer while studying calamine. It has several important industrial uses including in nickel-cadmium batteries, as an anti-corrosive coating for steel, and in semiconductors. However, cadmium is also toxic to humans and accumulates primarily in the kidneys, where high levels can lead to kidney failure. While cadmium intake has decreased in recent decades, it remains a concern due to negative health effects. Cadmium is obtained as a byproduct during production of other metals like zinc, copper and lead.
Nickel (Aimee Ellis)
Nickel is a silvery-white metal that is solid at room temperature with a melting point of 1455 degrees Celsius. It was discovered in 1751 by Swedish chemist Axel Cronstedt, who originally believed it was copper (Kupfernickel translates to Devil's copper). Nickel is primarily found in ores and its most important properties are its high melting and boiling points. It is used as a catalyst in hydrogenation reactions, in heat regulation, in nuclear reactors, and in producing corrosion-resistant alloys and stainless steel.
Chlorine Presentation.pdf
Carl Wilhelm Scheele discovered chlorine in 1774 through reacting hydrochloric acid with manganese. Sir Humphrey David later correctly identified it as a non-metal element in 1810. Chlorine is a greenish-yellow diatomic halogen gas with an electron configuration of 2-8-7. It is rarely found in nature but widely used in water treatment and sanitation to kill bacteria and viruses. The discovery of chlorine's properties and uses has changed history by improving public health.
Oka (1)
This document provides information about chlorine and swimming pools. It discusses that chlorine is a yellow-green gas that is used in small amounts in swimming pools to prevent bacteria growth in the water. It also notes that calcium hypochlorite and bromine are sometimes used as alternatives to chlorine for disinfecting pool water. The document includes additional facts about the properties and history of chlorine.
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Niobium is a shiny grey metal that was first discovered in 1801. It was initially confused with tantalum but was proven to be a separate element in 1844. Niobium is mined primarily from the mineral pyrochlore and is used to strengthen steel and superconducting magnets. Its main applications are in jet engines, MRI machines, eyeglasses, and jewelry due to its hypoallergenic properties. Though not a household name, niobium plays an important but often unseen role in industries like aerospace, medical, and science.
Chlorine (Samuel Boateng)
Chlorine is a greenish-yellow gas that was first isolated in 1774 by Swedish chemist Carl Scheele. It is one of the most abundant elements and is found in compounds like sodium chloride. Sir Humphrey Davy named chlorine in 1810. Chlorine has many uses including water treatment, bleaching, and producing chemicals like hydrochloric acid, plastics, and pharmaceuticals. It is highly reactive and poisonous in its pure gas form.
Barium (Shaun Reynolds)
Barium is a silvery-white metal that is extracted from barite ore. It was discovered in 1774 in Europe and named after the Greek word for heavy. Barium has several applications including use as a getter in vacuum tubes to remove gas, in spark plug wires as an alloy with nickel, and as barium sulfate for drilling mud weighting and medical imaging contrast. Its main properties are a melting point of 727°C, boiling point of 1897°C, and density of 3.51 g/cm3.
Magnesium (Amanda Manning)
Magnesium is the 6th most abundant element in the Earth's crust. It was first isolated in 1808 by Sir Humphry Davy through electrolysis of magnesium oxide. Magnesium is a silvery-white metal that is solid at room temperature but highly flammable at specific temperatures. Its main uses include flash photography, pyrotechnics, and in producing magnesium alloys for aircraft and missiles.
Calcium (Rebecca Barnes)
Sir Humphry Davy discovered calcium in 1808 by electrolyzing lime and mercuric oxide. Calcium is the fifth most abundant element in the Earth's crust and is essential for animal skeletons and plant growth. It has an atomic number of 20, melting point of 839 degrees Celsius, and is commonly found in limestone, eggshells, and mollusk shells.
Ruthenium (Brittany Lewin)
Ruthenium is a rare hard white metal that was discovered in 1827 in Russia. It has a high melting point of 2,250°C and boiling point of 4,150°C. Ruthenium is used in the electronic and chemical industries and for making wear-resistant electrical contacts, jet engine blades, and fountain pens. It is one of the rarest metals on Earth and is found in North and South America and South Africa.
Sodium (Katie Carrico)
This document provides information about the element sodium. It discusses that sodium is a soft, silvery-white metal that is highly reactive. It notes that sodium is the sixth most abundant element on Earth and is found in compounds like salt. The document outlines the uses of sodium, including in making soap, glass, and sodium vapor lamps. It also discusses sodium isotopes and their use in medicine and testing oil pipelines.
Helium (David Tucker)
Helium is a colorless, odorless noble gas that was discovered in 1895. It is nonflammable and less dense than air, so it is often used in balloons and blimps. Helium exists as a trace element in the atmosphere but is primarily found trapped within rocks and minerals in the earth's crust. It is obtained commercially as a byproduct of natural gas extraction. Helium has no known compounds and is inert, making it useful for applications like welding, breathing mixtures, and cryogenics where non-reactivity is important.
Neon (Hayley Wayne)
Neon is a colorless, odorless noble gas with an atomic number of 10. It was discovered in 1898 by William Ramsay and Morris Travers. Some key facts about neon are that it is used widely in neon signs and lights, it exists in small percentages in the universe, sun, and Earth's crust, and it has three stable isotopes.
Beryllium (Tara Lay)
Beryllium is a lightweight gray metal that occurs naturally as a component of various minerals. It was first discovered in 1798 by a French chemist who found it present in emeralds and beryl. Beryllium has a high melting point and is used in applications requiring rigidity, stiffness, and heat resistance, such as spacecraft, aircraft, and electronics. It is toxic if inhaled and exposure carries health risks like chronic beryllium disease.
Rubidium (Howard Wood)
Rubidium is a soft, silvery-white metal that was discovered in 1861 by spectroscopic analysis. It ignites spontaneously in water and has a melting point of 312.2K and boiling point of 961K. The most abundant isotope is Rubidium-85. Rubidium is the 23rd most abundant element in the Earth's crust and is found in minerals such as lepidolite. Common compounds include rubidium chloride, hydroxide, and carbonate. Uses include research on batteries and optical glasses, though applications are limited outside research settings.
Zirconium (Haley Post)
Zirconium is a transition metal that was discovered in 1789 within the mineral zircon. It has several stable and one radioactive isotope. While difficult to isolate pure zirconium due to its chemical similarity to hafnium, the Kroll process is commonly used. Zirconium has many applications including use in nuclear reactors due to its resistance to neutron absorption, as an alloy for steel, and in gemstones like cubic zirconia.
Rhodium (Megan Wogan)
Rhodium is a shiny silver-colored metal that was discovered in England in 1803. It has a high melting point of 1966°C and boiling point of 3727°C. Rhodium is very dense, with a density of 12.4 g/cm3, higher than water and steel. It is commonly found with nickel and copper in South America and Canada. Rhodium is primarily used for plating jewelry and coins and alloying with platinum and palladium for hardness.
Radium (Evan Clark)
Radium was discovered in 1898 by Marie Curie in the mineral pitchblende. It is a silvery-white radioactive metal with an atomic number of 88 that occurs naturally in uranium ores. Radium decays into other radioactive elements, emitting alpha, beta, and gamma radiation that can be dangerous to human health if exposed in sufficient amounts. It was historically used to paint watch and clock faces but is no longer used for that purpose due to its radioactivity. Today, radium is used to treat cancer through brachytherapy procedures.
Selenium (Matthew Calme)
Selenium is a non-metallic element discovered in 1817 by Swedish scientist Jöns Jacob Berzelius. It has various industrial uses including in photocopiers, solar cells, and cameras due to its ability to conduct electricity when exposed to light. Selenium is rarely found in nature but can be extracted from copper sulfide and ranks 31st in abundance among elements. It has a melting point of 493.65 K and is also used in dandruff shampoos and is an essential nutrient found in foods like Brazil nuts, fish, and whole grains.
Potassium (Megan Fish)
Potassium is a soft silver metal that was first isolated in 1807 by Sir Humphrey Davy through electrolysis. It makes up 2.4% of the Earth's crust and is found in rocks, minerals, lakes, and seas. Potassium oxidizes quickly in air and is highly reactive, catching fire when exposed to water. It has important industrial uses like in fertilizers and drain cleaners when combined with other elements. Potassium is also essential for human bodily functions and our bodies contain over 100g of it.
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Selenium is a chemical element discovered in 1817 by Jons Berzelius in Sweden. It is commonly found in sedimentary rock and often accompanies sulfide minerals or silver, copper, lead, and nickel minerals. Selenium has various properties depending on its form - it is red in powder or crystalline form and gray in its metallic form. It has several industrial and medical uses, including in solar cells, catalysts, and producing medical radioisotopes. Dietary sources of selenium include Brazil nuts, fish, meat, eggs, brewer's yeast, and various seeds.
Cadmium (Jeremy Willett)
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Nickel (Aimee Ellis)
Nickel is a silvery-white metal that is solid at room temperature with a melting point of 1455 degrees Celsius. It was discovered in 1751 by Swedish chemist Axel Cronstedt, who originally believed it was copper (Kupfernickel translates to Devil's copper). Nickel is primarily found in ores and its most important properties are its high melting and boiling points. It is used as a catalyst in hydrogenation reactions, in heat regulation, in nuclear reactors, and in producing corrosion-resistant alloys and stainless steel.
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Manganese is a gray-white metal that occurs naturally as compounds in minerals. It was discovered in 1774 by Johan Gottlieb Gahn when he heated the mineral pyrolusite. Manganese is the 12th most abundant element in the Earth's crust and is essential in steel production. It is commonly obtained by heating manganese dioxide with carbon or aluminum. Major uses include steel production, glass decolorization, and manganese oxide in batteries and pigments.
Argon (Chelsea Colon)
This document provides information about an invisible, odorless gas that is found in the atmosphere. It was first identified in Scotland by Lord Rayleigh and Sir William Ramsay. It is a noble gas with a boiling point of 87.30K and melting point of 83.80K. Its main uses are in light bulbs and medical lasers. The gas is argon, with the symbol Ar and part of the noble gases in group 18 of the periodic table.
Zinc (Zak Konys)
Zinc is a bluish-white metal that is found naturally in the Earth's crust. It was likely first discovered and purified in ancient China around 1000 AD, and was later described as a metal by the Swiss alchemist Paracelsus in the 15th century. Zinc is commonly used today to galvanize other metals and prevent corrosion, as well as in the production of many compounds for applications like rubber, paint pigment, animal feed supplements, and more. The largest producers of zinc today are China, Australia, Peru, the United States, and Canada.
Cobalt (Samantha Johnson)
Georg Brandt discovered cobalt in 1739 while attempting to prove that the blue color in glass came from an unknown element, not bismuth as previously thought. Cobalt is a hard, silvery-gray metal that is resistant to corrosion and oxygen. It has many uses including in superalloys for jet engines, magnets, batteries, colorants like blue glass, and medical radiation therapy using radioactive cobalt-60. The Democratic Republic of Congo is the leading producer of cobalt today.
Chromium (Jeff Jansen)
Chromium is a silvery metallic element with an atomic number of 24. It was discovered in 1797 by Louis-Nicholas Vauquelin and is commonly found in chromite ore. Some key uses of chromium include chrome plating, production of paints and pigments, and hardening steel. It has a high melting point and is used in applications like armor plating, ball bearings, and cutting tools.
Bromine (Amber Boyers)
Bromine is a reddish-brown liquid element that was discovered in 1826 by Antoine Balard. It has a distinct foul odor due to its Greek name meaning "stench." Bromine is the only nonmetallic element liquid at room temperature and can be found in salt springs, salt deposits, and the earth's crust. It has various industrial and medical uses such as in swimming pools, pesticides, batteries, and some medications.
Germanium (Brandy Ashcraft)
Germanium was first proposed in 1871 and discovered in 1886 by German chemist Clemens Winkler. It is a brittle metalloid that is a semiconductor. It is used in electronics, fiber optics, and infrared optics due to its conductivity and transparency to infrared radiation. The largest use is in the semiconductor industry for making transistors.
Iron (Sarah Henson)
Iron has been used by ancient civilizations for thousands of years. Beads made of meteoric iron dating back to 3,500 BC have been found in Egypt, and cast iron was produced in China as early as 550 BC. Iron is abundant on Earth and is found in the core as well as in minerals like hematite and magnetite that are mined for iron production. Iron has many important industrial and biological uses due to its magnetic and structural properties.
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Mind map of terminologies used in context of Generative AI
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Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-und-domino-lizenzkostenreduzierung-in-der-welt-von-dlau/
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みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
ここ3000字までしか入らないけどタイトルの方がたくさん文字入ると思います。
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Chlorine (Chelsie Dedman)
- 2. History! The name “chlorine” derives from the Greek word chloros, meaning “pale green” Chlorine was discovered in Uppsala, Sweden by C.W. Scheele. However, Sir Humphry Davy is the one who concluded it was an element
- 3. Properties! At room temperature, Chlorine is a gas Chlorine is of a pale greenish-yellow color The melting point is -101° C The boiling point is -34° C The density of Chlorine is 3.214 g/cm³ Major isotopes: 35C, 36C, 37C. 36C is used in research as a tracer.
- 4. Availability! Chlorine is not found by itself in nature. Instead, it is found in many compounds. In nature, it can be found in salt of the ocean water, carnallite, and sylvite. To get the element, one must contact a chemical company like Sigma-Aldrich. Chlorine usually costs around $0.15 for every 100 g
- 5. Uses! By itself, chlorine is not used very much, but it is used to create many compounds for many purposes. It can be found in bleach, and it is also used in water purification. It can also be used in making insecticides in the form of chlorinated hydrocarbons. Major compounds include: 1. CaOCl: Calcium hypochlorite- bleaching and swimming pool disinfectant 2. KClO3: Potassium chlorate- fireworks 3. NaCl: Sodium chloride- salt 4. Ethylene dichloride: used to make polyvinyl chloride- PVC
- 6. Fun Facts! Chlorine is among the top 10 most produced chemicals in the U.S.
- 7. Resources! http://www.chemicool.com/elements/chlorine.html http://www.rsc.org/chemsoc/visualelements/pages/data/chl orine_data.html http://www.periodic-table.org.uk/element-chlorine.htm http://science.jrank.org/pages/1440/Chlorine.html http://science.jrank.org/pages/1438/Chlorine-Properties- uses-chlorine.html http://science.jrank.org/pages/1439/Chlorine-Compounds- chlorine.html http://www.chemistryexplained.com/elements/A- C/Chlorine.html http://chemistry.about.com/od/periodictableelements/ig/Ele ments-in-the-Human-Body/Chlorine.--WP.htm