Chemistry 9.1 Notes “Naming Ions”

I. Monoatomic Ions A. Def – ions that consist of one atom 1. Usually can be determined by the p.t. 2. Group #4 typically does not form an ion 3. Using the P.T.

Group #1 1A Group #2 2A Group #3 3A Group #4 4A Group #5 5A Group #6 6A Group #7 7A Group #8 8A N/C Li, Na, K, Rb, Cs Be, Mg, Ca, Sr, Ba AlN, P, AsO, S, Se F, Cl, Br, I

4. Transitions metals -Have more than one ionic charge -Ex: Iron forms Fe 2+ and Fe Classical vs. Stock (pg. 255) 1. Classical -“ous” – used with lower charged ion -“ic” – used with higher charged ion -Ex: Copper (Cu 1+ and Cu 2+ ) -Cuprous ion 1+ / cupric ion 2+

-Cobalt has 2 ions. One loses 2 electrons and one loses 3 electrons. What are the classical names of cobalt? -Cobaltous ion / Cobaltic ion 2. Stock -use roman numerals to indicate the type of ion. -Ex: Copper and its 2 ions. -Copper(I) ion -Copper(II) ion -Ag 1+, Cd 2+, Zn 2+ are transition metals that have only 1 ion (so no r.n. is needed)

II. Polyatomic Ions A. Def – tightly bound groups of atoms that carry an ionic charge. -Pg naming: Per + chlorate (Cl + O 4 ) Chlorate (Cl + O 3 ) Chlorite (Cl + O 2 ) Hypo + Chlorite (Cl + O) -all have a 1- charge B. Memorize the following polyatomic ions and their charges. (see handout)

C. Adding Hydrogen 1. Hydrogen as an ion is considered Ex: H + CO 3  HCO - H + PO 4  HPO 4 2-

Assignment What are the charges of the following ions: -sulfur-argon-bromine -strontium-ferric-plumbous 2. How many electrons are lost or gained when the following ions are formed? -Fe (3+)-Cu (+)-O (2-) -Cd (2+)-N (3-)-Hg (2+) 3. What is the chemical formula when H is added to silicate? 4. Compare and contrast classical and stock naming of ions? Give an example for both.