12/8/2013
Warm Up 21: First determine if ionic or covalent, then
give the name or formula
1. CaSO4
2. VO2
3. N2O7
4. Tin (IV) selenide
5. diselenium diiodide
6. Ammonium oxide
Warm Up 21: Determine name or formula
1. CaSO4
Ionic: Ca is a metal
calcium sulfate
2. VO2
Ionic: Vanadium is a metal
Vanadium(IV) oxide
3. N2O7
Covalent: Nitrogen is nonmetal
Dinitrogen heptoxide
1
12/8/2013
4. Tin (IV) selenide
Ionic: tin is a metal
+4
-2
Sn2Se4
reduce = SnSe2
5. diselenium diiodide
Covalent: there are prefixes
Se2I2
6. Ammonium oxide
Ionic: Ammonium is a polyatomic
+1
-2
(NH4)2 O
2