1. Covalent Compounds Formula to Name

2. Binary Covalent Compounds
Covalent bond: atoms share electrons
Binary Covalent Compound: compound made from two non-metals that share electrons
Non
metal
Non
metal
Covalent compound

3. Binary Covalent: Naming
To identify:
2 non-metal elements
To name:
Name of the first element with the prefix indicating the number of atoms (no “mono-”)
Name of the second element with the prefix indicating the number of atoms (use “mono-”) and the suffix “ide”

4. Covalent Prefixes 1 = mono- 2 = di- 3 = tri- 4 = tetra- 5 = penta-
6 = hexa-
7 = hepta-
8 = octa-
9 = nona-
10 = deca-

5. Covalent Example #1
P2O5

6. Covalent Example #2
SiO2

7. Write the name for the following compounds
Let’s Practice
CO2
N2O4
P4O10 CO
Example:
Write the name for the following compounds

8. Covalent Compounds Name to Formula

9. Binary Covalent: Writing Formulas
To identify:
Covalent prefixes used!
To write these formulas:
Write the symbols of the first and second element
Use the covalent prefixes (assume the first element is “1” if there’s no prefix) as the subscripts to show number of atoms.
Atoms do not form ions when bonding covalently…you DO NOT need to worry about charges with this type! 

10. Dinitrogen Tetraoxide
Covalent Example #3
Dinitrogen Tetraoxide

11. Write the following chemical formulas
Let’s Practice
Carbon monoxide
Nitrogen dioxide
Diphosphorus pentaoxide
Example:
Write the following chemical formulas

12. A Word of Caution… “di” and “bi” do not mean the same thing! di- bi-
Stands for “2” in covalent compounds
Means there’s a hydrogen in the polyatomic anion
Carbon dioxide = CO2
Sodium biphosphate = Na2HPO4

14. Write the name for the following compounds
Let’s Practice
CO2
N2O4
P4O10 CO
Carbon dioxide
Dinitrogen tetraoxide
Tetraphosphorus decaoxide
Carbon monoxide
Example:
Write the name for the following compounds

15. Nomenclature Summary Naming Chemical Formulas
Starts with a metal or NH4
Does not contain a metal = Binary Covalent compound
2 capital letters = Binary Ionic
More than 2 elements = Polyatomic Ionic

16. Mixed Practice – Ionic and Covalent
Na2O
K3PO4
Cu(OH)2
(NH4)2S
MgCl2
Example:
Write the name for the following compounds

17. Write the name for the following compounds
Mixed Practice
Na2O
K3PO4
Cu(OH)2
(NH4)2S
MgCl2
Sodium oxide
Potassium phosphate
Copper (II) hydroxide
Ammonium sulfide
Magnesium chloride
Example:
Write the name for the following compounds

18. Nomenclature Summary Writing Chemical Formulas
Does not contain covalent prefixes
Does contain covalent prefixes = Binary Covalent compound
Ends with “-ide” (except hydroxide & cyanide) = Binary Ionic
All others = Polyatomic Ionic

19. Write the following chemical formulas
Mixed Practice
Magnesium hydroxide
Copper (II) nitrate
Iron (III) oxide
Nitrogen dioxide
Sodium bicarbonate
Example:
Write the following chemical formulas

20. Write the following chemical formulas
Mixed Practice
Magnesium hydroxide
Copper (II) nitrate
Iron (III) oxide
Nitrogen dioxide
Sodium bicarbonate
Mg(OH)2
Cu(NO3)2
Fe2O3
NO2
NaHCO3
Example:
Write the following chemical formulas