1. Binary Covalent Compounds

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. Covalent Prefixes 1 = mono- 2 = di- 3 = tri- 4 = tetra- 5 = penta-
6 = hexa-
7 = hepta-
8 = octa-
9 = nona-
10 = deca-
Two notes:
No “mono” on the first element name
If oxygen/oxide: do NOT include the final “o” or “a” on the prefix

4. Covalent Compounds Formula to Name

5. Binary Covalent: Formula to Name
To identify:
2 non-metal elements
To name:
Name of the first element with the prefix indicating the number of atoms
Name of the second element with the prefix indicating the number of atoms and the suffix “ide”

6. Covalent Example #1
P2O5

7. Covalent Example #2
SiO2

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

9. Covalent Compounds Name to Formula

10. Binary Covalent: Name to Formula
To identify:
Covalent prefixes used!
To write:
Write the symbols of the first and second element
Use the covalent prefixes (assume the first element is “1” if there is 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! 

11. Covalent Example #3
Dinitrogen Tetroxide

12. Covalent Example #3 12

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

14. 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

16. 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

17. 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

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

19. 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

20. 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

21. 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

22. 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