1. Compound Names and Formulas
Ionic & Covalent

2. First…
Ionic Compounds

3. Naming Ionic Compounds
Metallic
Covalent
Remember: 2 or more oppositely charged ions attract to form an ionic bond
Cations : + positive
Anions : - negative
To form the name of an ionic compound
Cation goes first
Anion is second (has a different ending, usually –ide or -ate)
BaO -- Barium Oxide
NaF -- Sodium Fluoride
BaF Barium Fluoride

4. Common Cations
Ionic
Metallic
Covalent

5. Common Anions
Ionic
Metallic
Covalent

6. Writing Ionic Compound Formulas
Metallic
Covalent
Make a neutral compound # + = # -
Lithium Oxide
List the symbols for each ion (cation first)
Li+ O2-
Determine the least common multiple of the ions’ charges needed to make a neutral compound
Need 2 Li+ and 1 O2-
Write the chemical formula, indicating with subscripts how many of each ion are needed
Li2O

7. Naming Ionic Compounds
Metallic
Covalent
Some cations have different charges
Use roman numerals to show the charge
Copper Oxide
Copper ions can be Cu+ or Cu2+
Oxide ion is O2-
Could be Cu2O or CuO
Both appear to be copper oxide.
Distinguish with roman numerals
Cu2O is copper(I) oxide
CuO is copper(II) oxide

8. Writing Ionic Formulas
Metallic
Covalent
Write formulas for the following ionic compounds.
magnesium bromide
rubidium oxide
lithium nitride
potassium sulfate
ammonium phosphate
MgBr2
Rb2O
Li3N
K2SO4
(NH4)3PO4

9. Next…
Covalent Compounds

10. Naming Covalent Compounds
Ionic
Metallic
Covalent
Prefixes are used to name covalent compounds
Left-most element (on the periodic table) is written first
If only one atom, then no prefix
Right-most element is written second and ends in –ide
Always gets a prefix

11. Prefixes Used to name Covalent Compounds
Ionic
Metallic
Covalent

12. Naming Covalent Compounds
Ionic
Metallic
Covalent
BF3
Boron
Tri
fluoride

13. Naming Covalent Compounds
Ionic
Metallic
Covalent
H2O Di
hydrogen
Mono
oxide
Assume 1

14. Ionic
Metallic
Covalent

15. Review of naming Name the following covalent compounds: As2O5 SiI4
Ionic
Metallic
Covalent
Name the following covalent compounds:
As2O5
SiI4
P4S3
P4O10
SeO2
PCl3
Diarsenic pentoxide
Silicon tetriodide
Tetraphosphorous trisulfide
Tetraphosphorous decoxide
Selenium dioxide
Phosporus trichloride

16. Review of naming Name the following ionic compounds Ni3(PO4)2 FeI2
Metallic
Covalent
Name the following ionic compounds
Ni3(PO4)2
FeI2
MnF3
CrCl2
NaCN
CuS
Nickel(II) phosphate
Iron(II) iodide
Manganese(III) fluoride
Chromium(II) chloride
Sodium cyanide
Copper(II) sulfide