Ionic bonding
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Ionic bonding occurs when atoms combine to form ions that are held together by electrostatic attraction between oppositely charged ions. Metals bond ionically with nonmetals by transferring electrons from the metal to the nonmetal, forming cations and anions that bond to create an electrically neutral compound. Examples provided are sodium (Na+) bonding with fluorine (F-), magnesium (Mg2+) bonding with chlorine (Cl-), and aluminum (Al3+) bonding with oxygen (O2-).
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This document provides information about electrolysis. It discusses:
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2. The rules for what products are formed at the electrodes during electrolysis of molten ionic compounds and ionic solutions. Hydrogen, metals, halogens, oxygen may be produced depending on the ions present.
3. Industrial applications of electrolysis including producing chlorine and sodium hydroxide from salt water, and purifying copper.
BINARY IONIC COMPOUND.pptx
This document provides information on binary compounds and ionic compounds containing polyatomic ions. It defines binary compounds as those containing only two elements and ionic binary compounds as those where one element is a metal and the other is a non-metal. Rules are provided for naming ionic compounds containing metals and non-metals or polyatomic ions. Key points include that polyatomic ions are charged groups that don't occur alone and ionic compounds contain positive and negative ions to be neutral overall. Formulas show how to write names and formulas for ionic compounds containing polyatomic ions.
Ions-and-Molecules.pptx
This document discusses the naming of ions and ionic compounds. It begins by defining ions as atoms that have gained or lost electrons, making them positively or negatively charged. It then discusses naming conventions for different types of ions including monoatomic and polyatomic ions, and ions of metals, nonmetals, transition metals and halogens. Rules are provided for naming ionic compounds formed from combinations of these ions. The document also discusses naming conventions for molecular compounds formed from nonmetals, and compounds involving polyatomic ions, hydrated salts, and acids.
Properties and Formation of Ionic Compounds Powerpoint
Ionic compounds form when ions bond through electrostatic attraction. Metals form cations by losing electrons to achieve a full outer shell, while nonmetals form anions by gaining electrons. Cations and anions are attracted due to their opposite charges. Ionic compounds have high melting points, are crystalline solids, and dissolve in water due to the separation of ions. They do not conduct electricity as solids but do so as liquids or dissolved solutions.
Chem matters ch6_ionic_bond
1) Noble gases are unreactive because their outer electron shells are full, giving them a stable configuration.
2) Atoms form ions to achieve a full outer shell like noble gases. Metals form cations by losing electrons, and non-metals form anions by gaining electrons.
3) Ionic bonds form when oppositely charged ions are attracted to each other, such as sodium and chloride ions forming sodium chloride. The chemical formula shows the ratio of ions.
NOMENCLATURE OF BINARY POLY-ATOMIC COMPOUNDS
Giving names to chemical compounds, formulae, common polyatomic atoms. introduction about binary compounds, ionic bonds. provided with examples of binary ionic compounds.
Introduction to Chemical Bonds
Atoms form ions by gaining or losing electrons to achieve a full outer electron shell like noble gases. Ions then bond to form ionic compounds between metals and nonmetals like NaCl. Covalent bonds form when atoms share electrons to achieve full outer shells, like in H2O. Polyatomic ions, which are ions of two or more bonded atoms, can also participate in ionic bonding, such as Ca(OH)2 which contains hydroxide ions bonding to calcium ions. The number of each type of atom in a compound is shown by subscripts based on the ions formed.
Naming Ionic and Covalent Compounds
1. The document provides an overview of writing formulas and naming ionic and covalent compounds. It reviews the periodic table and properties of metals, nonmetals and metalloids.
2. Key concepts covered include ion formation, the octet rule, polyatomic ions, oxidation numbers, naming conventions for ionic compounds containing metals or transition metals, and prefixes used in naming covalent compounds.
3. The document distinguishes between ionic and covalent bonding, lattice structures, and molecular structures of compounds.
Redox reaction Group C
This document discusses oxidation and reduction reactions. It defines oxidation as a reaction where oxygen combines with an element/compound or where an element loses hydrogen or electrons. Reduction is defined as a reaction where an element gains oxygen, hydrogen, or electrons. Common reducing agents are listed such as lithium aluminium hydride and sodium borohydride. The concept of oxidation state is introduced, which is the charge an atom would have if it existed as an ion in a compound. Rules for determining oxidation states are provided. An example of finding the oxidation states of elements in ammonium sulfate is worked out.
METALS AND NON-METALS.ppt (1).pdf
This document provides information on the physical and chemical properties of metals and non-metals. It discusses how metals are generally solids with high melting and boiling points that are malleable and good conductors, while non-metals exist in different physical states and have lower melting/boiling points. It also describes how metals react with oxygen, water, and acids to form metal oxides, hydroxides, and salts. Common extraction methods for metals from their ores include concentration, reduction, and refining. Corrosion of metals and methods to prevent it are also outlined.
Metals and non metals
This document discusses the physical and chemical properties of metals and non-metals. It describes how metals react with oxygen, water, acids and metal salt solutions. Metals are listed in a reactivity series from most reactive to least reactive. The document outlines how ionic compounds form and their properties. The extraction, refining and corrosion of metals is summarized along with methods for preventing corrosion.
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Properties and Formation of Ionic Compounds Powerpoint
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Solution concentration
This document discusses different units for expressing concentration of solutions, including percent, parts per hundred (pph), and parts per million (ppm). It provides an example of calculating the concentration in percent by mass of a solution containing 25 g of sucrose dissolved in 175 g of water.
Digestion acids
Acids have a pH between 1 and 7, with stronger acids having a lower pH. They are able to break down chemicals into smaller parts through chemical reactions. Our bodies use acid in digestion to break down food. Hydrochloric acid in the stomach has a very low pH of 2.0 and helps break down food, though the stomach is lined with mucus to protect it from this strong acid. Heartburn occurs when stomach acid rises into the esophagus, and is often treated by neutralizing the acid with products containing calcium carbonate like TUMS.
Acids & bases
Acids have H+ ions dissolved and are corrosive to metals, with a sour taste and pH below 7. Bases have OH- ions dissolved, feel soapy or slippery, have a bitter taste, and pH above 7. The pH scale measures if a substance is acidic, basic, or neutral, with 0-7 being acidic, 7 being neutral, and 7-14 being basic. A change of one pH unit is a 10 times difference in acidity or basicity, so a pH of 2 is 100 times more acidic than a pH of 4. Water that is too acidic or basic can harm fish development, increase toxic metals, or dissolve organic materials like skin and scales. Drinking water should have a
Reaction rates
The document discusses chemical reactions and factors that affect their rates. It explains that reactions can be exothermic, releasing energy, or endothermic, absorbing energy. All reactions require a minimum amount of energy called the activation energy to initiate the rearrangement of reactants into products. The rate of reactions can be increased by raising the temperature, increasing the concentration or surface area of reactants, using catalysts to lower the activation energy, or through mechanical means like stirring. An experiment is described that shows reaction rates increase as particle size decreases due to greater surface area exposure.
Covalent bonding
Covalent bonds form between two atoms that share a pair of electrons. To draw covalent bonds, determine the number of valence electrons for each atom and draw them as dots singly or in pairs. Electrons spread out first before pairing up. Covalent bonds are then drawn as lines between atoms to show how the valence electrons are shared to form molecules such as H2 and CH4.
Major molecule properties
The four major molecules in food are carbohydrates, fats, proteins, and water. Carbohydrates provide the body's main source of energy and are found in grains, rice, bread and other foods. Fats also provide energy and are important for health, though eaten in excess they are stored in the body. Proteins are made of amino acids and are essential for many processes in the body. Finally, water makes up 70% of the body and is necessary for transport and chemical reactions.
The water cycle
The water cycle describes the continuous movement of water on, above, and below the surface of the Earth. Water evaporates from surfaces like oceans, lakes, and rivers and rises into the air as vapor. The vapor cools and condenses to form clouds and precipitation falls back to Earth as rain, snow, sleet, or hail, completing the cycle.
Solubility
Something dissolved in the Snake River could have caused the fish kill. Polar molecules and ionic compounds can dissolve in water due to the attractions between the water molecules and these substances. The rule is that "like dissolves like," so polar substances dissolve in polar water, while nonpolar substances do not. As temperature increases, the solubility of solids and gases generally increases and decreases, respectively, as shown by solubility curves.
Symbols & formulas
Chemical formulas have three parts: symbols, subscripts, and coefficients. Symbols represent elements with the first letter capitalized. Formulas show what elements are connected and subscripts indicate the number of each atom. Coefficients show how many copies or molecules there are and atoms are separate, not connected. Examples are given of formulas such as CO2, C12H22O11, and MgCl2 to demonstrate how to read the subscripts and coefficients.
Properties of metals and nonmetals
Metals are found on the left side of the periodic table, have properties such as luster, malleability, conductivity, and react with acids. Nonmetals are found on the right side, have properties such as being dull, brittle, not conducting electricity, and usually being gases. Metalloids are in between metals and nonmetals on the periodic table and have some properties of both.
Physical & chemical properties
This document discusses the physical and chemical properties of matter. It defines matter as anything that has mass and takes up space. Physical properties can be observed without changing the material and include characteristics like color, hardness, and melting point. Chemical properties involve a change in the material's composition through reactions with other substances, such as rusting or burning. Some examples provided assess whether various phenomena are physical or chemical properties.
Mixtures
A mixture is a combination of two or more substances that can be physically separated and where the substances retain their own properties. Mixtures can be either homogeneous, where the substances are evenly distributed throughout so it appears to be one substance, or heterogeneous, where the distinct substances can be seen separated into more than one phase. Examples of mixtures include solutions, suspensions, and alloys.
Elements & compounds
The document discusses the differences between elements and compounds. It explains that elements are pure substances made of only one type of atom, while compounds contain two or more different types of atoms that are chemically bonded together. It provides examples of common elements like carbon, oxygen, and neon, as well as examples of compounds, including water (H2O) and sodium chloride (NaCl).
Density
Density is a measurement of how much mass is contained within a given volume, calculated by dividing the mass of an object by its volume. A document provides instructions on how to calculate the density of a substance with a mass of 17.63g and volume of 43cm3, which equals 0.41 g/cm3, identifying the substance as the least dense compared to others.
Density
Density is a measurement of how much mass is contained within a given volume, calculated by dividing the mass of an object by its volume. A document provides instructions on how to calculate the density of a substance with a mass of 17.63g and volume of 43cm3, which equals 0.41 g/cm3, identifying the substance as the least dense of those listed.
Temperature & Volume
Gay-Lussac's Law states that pressure and temperature are directly related for a gas at constant volume: if temperature increases, pressure increases; if temperature decreases, pressure decreases. This is because temperature affects the kinetic energy of gas particles - higher temperature means more kinetic energy and more frequent and energetic particle collisions, resulting in higher pressure. The law can be expressed as P1/T1 = P2/T2, allowing calculations of pressure changes with temperature changes when volume is held constant and temperatures are in Kelvin.
Pressure & Volume
This document discusses the kinetic molecular theory and Boyle's law. It explains that gases are made of molecules that are far apart from each other and move randomly, colliding with the container walls. According to Boyle's law, if the volume of a container decreases, the pressure increases because the molecules collide with the walls more frequently. The document provides the formula for Boyle's law, P1V1 = P2V2, and gives examples of using it to calculate pressure and volume.
Pressure
Pressure is defined as force per unit area. It can be measured in units such as pounds per square inch, atmospheres, or pascals. Air pressure in the atmosphere is caused by gas molecules constantly colliding with surfaces and exerting force. Standard air pressure at sea level is approximately 101 kPa or 14.7 psi. Pressure calculations involve dividing the total force by the area over which that force is applied.
Matter notes
Matter comes in four forms: solids have a definite shape and volume, liquids have a definite volume but not shape, gases have no definite shape or volume, and plasmas are charged particles with no definite shape or volume. The document introduces the basic properties and states of matter, including solids, liquids, gases, plasmas, atoms, and examples of things made of plasma like flames, nebulae, and stars.
Volume notes
The document discusses volume, which is the amount of space an object occupies. It describes how to measure volume using beakers or graduated cylinders and notes units like liters and milliliters. For liquids, a graduated cylinder should always be used to measure volume and the meniscus read from the bottom. For solids, regular objects use the formula of length x width x height while irregular objects use water displacement by finding the difference in water level before and after the object is added.
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Ionic bonding
- 2. Ion Quiz… Give the Ion Symbol that will be formed for each atom: 1. Sulfur 2. Boron 3. Nitrogen 4. Magnesium
- 3. What do these compounds have in common??? • C12H22O11 sugar • C2H5OH ethanol • C6H8O6 vitamin C
- 4. Chemical Bonding When atoms combine to form new, more stable substances.
- 5. Ionic Bonding The positive and negative ions form and attract each other, holding the structure together (it’s a strong bond). + - + - Will only happen if you have one metal and one nonmetal!
- 6. Na-Sodium F-Flourine 11+ 9+ Na+1 F-1
- 7. Atoms Ionicly Bond to become a NEUTRAL compound. Bond Sodium & Fluorine: Na+1 + - F-1 Always write the Metal FIRST Compound Formed: NaF Bond Magnesium & Chlorine: Mg+2 + - Cl-1 + - Cl-1 Compound Formed: MgCl2
- 8. Bond Aluminum & Oxygen: Al+3 + - O -2 + - + - O-2 Al+3 + - + - O-2 + - Compound Formed: Al2O3