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

1+ 2+ 3+ N/C 3- 2- 1- 0

Li, Na, K, Rb, Cs

Be, Mg, Ca, Sr, Ba

Al N, P, As O, S, Se

F, Cl, Br, I

4. Transitions metals-Have more than one ionic charge-Ex: Iron forms Fe2+ and Fe3+

5. Classical vs. Stock (pg. 255)1. Classical

-“ous” – used with lower charged ion-“ic” – used with higher charged ion-Ex: Copper (Cu1+ and Cu2+)

-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 ion2. Stock

-use roman numerals to indicate the type of ion.

-Ex: Copper and its 2 ions.-Copper(I) ion-Copper(II) ion

-Ag1+, Cd2+, Zn2+ are transition metals that have only 1 ion (so no r.n. is needed)

II. Polyatomic IonsA. Def – tightly bound groups of atoms that

carry an ionic charge.-Pg. 257 -naming: Per + chlorate (Cl + O4)

Chlorate (Cl + O3) Chlorite (Cl + O2) Hypo + Chlorite (Cl + O)

-all have a 1- chargeB. Memorize the following polyatomic ions

and their charges. (see handout)

C. Adding Hydrogen

1. Hydrogen as an ion is considered 1+

2. Ex:

H + CO3 HCO-

H + PO4 HPO42-

Assignment 9.11. 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.