1. Discussion 6-1 Chemical Names & Formulas
CHEMISTRY I, Discusstion 6-1
Name___________________________
Discussion 6-1 Chemical Names & Formulas
1. How are ionic compounds named?
2. How is the chemical formula written for an ionic compound?
3. Why are molecular compounds named differently than ionic compounds?

2. Think About It!!!
The following chemical names are wrong. Correct them.
CaCl2 calcium dichloride
Na2CO3 sodium carbon oxide
CCl4 tetracarbon chloride
The following chemical formulas are wrong. Correct them.
aluminum oxide Al3O2
sodium nitrate Na3N
sulfur trioxide S3O

3. 1. How are ionic compounds named?
General Rule:
Variation—Transition Metal
Variation—Polyatomic Ion (instead of 1 nonmetal)

4. Ionic Compound Naming Examples:
1) CaO
2) K3P
3) FeCl3
4) PbO
5) Li2CO3
6) Ba(NO2)2

5. 2. How is the chemical formula written for an ionic compound?

6. Ionic Compound Formula Examples:
7) lithium oxide
8) magnesium bromide
9) chromium (III) oxide
10) copper (II) sulfide
11) sodium sulfate
12) magnesium phosphate

7. 3. Why are molecular compounds named differently than ionic compounds?

8. Prefixes for Molecular Compounds
Mono Di
Tri
Tetra
Penta
Hexa
Hepta
Octa
Nona
Deca

9. Molecular Compound Examples:
13) dinitrogen trioxide
14) phosphorus pentafluoride
15) tetrasulfur diiodide
16) Si2Cl6
17) NO2
18) P2O10

10. More Practice: Write the correct chemical formula.
19) sodium iodide
20) potassium carbonate
21) iron (III) oxide
22) copper (II) nitrate
23) barium chloride
24) aluminum hydroxide
25) phosphorus trichloride
26) carbon tetrabromide

11. More Practice: Write the correct chemical name.
27) S2Cl4
28) N2O5
29) KNO3
30) Na2SO4
31) Ca(OH)2
32) CuCl2
33) Fe2O3
34) Al2O3

12. More Practice: The Answers
NaI disulfur tetrachloride
K2CO dinitrogen pentoxide
21. Fe2O potassium nitrate
22. Cu(NO3) sodium sulfate
23. BaCl calcium hydroxide
24. Al(OH) copper (II) chloride
25. PCl iron (III) oxide
26. CBr aluminum oxide