Periodic table of elements Presentation Transcript
Lucia Artigas #1 9-2 21.10
Outline• 3. Periodic Table• 4. What is the elements Periodic Table Name?• 5. What is Argon? 6. Argon Ar• 7. What is its chemical makeup? 8. Building the Argon (Ar) Atom• 9. Facts• 10. What can it be mixed with?• 11. What can it not me mixed with?• 12. What is its basic use?• Citation
•What is theelementsPeriodic TableName?Ar= Argon
What is Argon?• third most common gas in the world, even more so than carbon dioxide.• The word “argon” means inactive, inert in Greek and refers to this gas in that it reacts with very few other elements in the periodic table. It has eight electrons in the outer shell, which make it very stable and resistant to reactions.• Argon is a gaseous chemical element which makes up almost one percent of the Earths atmosphere. Among the noble gases, argon is generally considered to be the most abundant, and it is sometimes used to replace other noble gases in situations where an inert gas in needed. The relatively nonreactive gas has a number of industrial uses, and argon isotopesare also used in radiocarbon dating for very old artifacts. Consumers may interact with argon now and then, primarily indirectly.
Argon Ar Atomic # Classification: 18 Noble gas 39.948 amu Non-metallicProtons/Electrons : 18 Group 18 •Colorless Gas Number Period 3 of Neutrons: 22
What is its chemical makeup?• If we add one proton and one electron to Chlorine we get an atom of the element Argon.• For Argon both Shell #1, Shell #2 and the s-orbital of Shell #3 are full. The first two p-orbitals of Shell #3 are full with two electrons and each of the other p-orbital of Shell #3 contains one electron for a total of 5 in the p-orbitals of Shell #3. The added electron that makes Chlorine into Argon will fill the third p-orbital of the third Shell (Shell #3) leading to a completely full Shell #3 as shown in the picture above.• Argon has 18 protons and 18 electrons which gives it an Atomic Number (Z) of 18.
Building the Argon (Ar) Atom
• Date of Discovery: 1894 Discoverer: Sir William Ramsay Lord Rayleigh at 1894 in Scotland. Name Origin: From the Greek word argon (inactive) The men had earlier noticed that a sample of nitrogen from the air appeared to be heavier than nitrogen extracted from other sources, and they theorized that the nitrogen might actually be mixed with other gases. Experimentation proved this theory correct, and they named the gas they discovered argon, named after the Greek argos, or “lazy one,” in a reference to the low reactivity of the gas.• Uses: Lighting Facts Obtained From: air
What can it be mixed with?• Although argon is a noble gas, it has been found to have the capability of forming some compounds. For example, the creation of the molecule argon fluorohydride (HArF), a metastable compound of argon with fluorine and hydrogen, was reported by researchers at the University of Helsinki in 2000. Argon-containing ions and excited state complexes, such as ArH+ and ArF, respectively, are known to exist. Theoretical calculations have shown several argon compounds that should be stable but for which no synthesis routes are currently known.• Argon, mixed with nitrogen, is used as a filler gas for incandescent light bulbs.
4)What can it not me mixed with?• Argon does not have any biological use. Diazotrophs, bacteria that absorb nitrogen and convert it to ammonia, may absorb argon, but they cannot apply it. Argon is non-water hazardous and no known environmental effects have occurred. Argon naturally has three stable isotopes, and we now know of nine instable isotop.•
5)What is its basic use?• Argon is used in situations where materials need to be protected from oxygen or other gases. A good example is an incandescent lightbulb, which consists of a metal wire inside a clear glass bulb. An electric current passes through the wire, causing it to get very hot and give off light. Argon is also used in welding. Welding is the process by which two metals are joined to each other. In most cases, the two metals are heated to very high temperatures. As they get hot, they melt together.• Argon is also used in argon lasers and argon-dye lasers. A laser is a device that produces very bright light of a single color (frequency). An argon laser is used to treat skin conditions. The laser shines a blue-green light on the affected area of the skin.