Table of Contents
1. Ions and ionic bonding
2. GoAnimate video
3.Chemical formulas and names
4.Properties of ionic compounds
5. Voki
6. Work Cited

Ions and Ionic Bonding
All atoms want\need a full shell to be stable but the only elements that starts with a full shell are the noble gases.(Trefil) When atoms have 5 to 7 valence electrons they usually get more stable when they increase to 8 electrons. Atoms with 1 to 3 valence electron usually become more stable when they lose electrons. An ion is an atom or group of atoms that have an electric charge. When an atom loses an electron it loses a negative charge and becomes a positive ion. (Miller) For example in real life if you get something negative then you get a negative attitude. When you get rid of something negative you lose something negative so you get a positive attitude, just like ions! Atoms can be made of more than one ion and those are called polyatomic ions. The attraction between two oppositely charged ions is called an ionic bond. When a compound has positive and negative ions it is called an ionic compound. (Miller).
The picture below shows a full valence shell.
valence electrons- neon
valence electrons- neon

If a sodium atom, which has one electron, starts coming towards a Chlorine atom which has seven electrons they will give up and gain electrons. The one electron in the Sodium atom will go to the Chlorine atom. This makes The Sodium atom positively charged and the Chlorine atom negatively charged. Then it will create Sodium Chloride other known as table salt. This process is called ionic bonding because the atom that has any more or any less of its true number of electrons and this is called an ion.(trefil) An ionic bond is the attraction between two oppositely charged ions. A compound made of positive and negative ions are called ionic compounds. (Miller)

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Chemical Formulas and Names
A chemical formula is a combination of symbols that show the ratio of elements in a compound. When ionic compounds form the ions come together in a way that balances the charges of the ions. (Miller) In the end the formula will be 100% balanced. There are two parts of a chemical formula, the chemical symbol and the subscript. The element symbol tells you the element and the subscript tells you the ratio of the elements. (Miller)For example in H2O the chemical symbols are H and O, the subscript is 2.

When naming an ionic compound the name of the positive ion comes first and the name of the negative ion comes second. The name of the positive ion is usually a metal but sometimes polyatomic ions exist. If the name of the second ion is a single ion and not a polyatomic ion then the end of the name changes to-ide. If the negative ion is polyatomic and not single then the end changes to -ate or -ite. (Miller)

Properties of Ionic Compounds

Ionic compounds are hard, brittle crystals that have high melting points. When the ions form into an orderly three dimensional arrangement they are called crystals. All ions are attracted to the oppositely charged ions that surround it. The pattern of ions stays the same no matter how large the crystal gets.(miller) Crystals have high melting points because the ions are packed so tightly together. When ions are heated they trn into liquids. Table salt has to be at least 801 degrees celcius before it melts. After they melt they cunduct energy because can move freely. In real life if you were stuck in a tight formation you would cunduct little energy because you wouldn't be able to move but if the box disapeared you would cunduct a lot of energy because you would be moving a lot. (Encyclopedia)


crystal structure
crystal structure
See how the ions of the same color are never touching, well thats because they are attracted to oppositly charged ions.




Sodium&Chlorine-transfer(sodium chloride bond)
Sodium&Chlorine-transfer(sodium chloride bond)
sodium (on the left) loses its one valence electron to chlorine (on the right),


resulting in

a positively charged sodium ion (left) and a negatively charged chlorine ion (r
SodiumChlorineIons
SodiumChlorineIons
ight).

TextbookMiller, Steve. Chemical Interactions Prentice of Science Explorer. L. Boston, Massachusetts: Pearson, 2009. 23, 24, 25, 26. Print.Encyclopediatrefil, James. "Ion." encyclopedia of science and technology.13. New York, London: routledge, 2001. 268,71 Print.Chemistry Encyclopedia"Chemical bonds." The world Book Encyclopedia of Science Chemistry. c. 3. Chicago, Illinois: world book inc., 2000. Print