1. Names and Formulas of Binary Covalent Compounds
Composed of covalent bonds (2 non-metals).
Rules:
First element (the one with lower electronegativity= farthest to the left or lowest in the group) is written first with the full name.
The second element has the ending –ide
Greek prefixes are used to indicate the number of atoms for each element.
EXCEPT: Mono- is not used on the first element
(ex. C2O2 is dicarbon dioxide while CO2 is carbon dioxide)

3. Prefixes show the number of each atom

4. Some examples with the first 5 prefixes
Name the following molecules:
1. CO2
2. PCl3
3. BrF

5. Try these yourself
Examples:
4. NO2
5. N2O
6. N2O5
7. SF6
8. P4O10

6. White Boards and Nomenclature!
Write down your answer on the white board and hold it up when you think that you have the answer!

7. CO
Carbon monoxide

8. CO2
Carbon dioxide

9. S2F6
Disulfur hexaflouride

10. P4O10
Tetraphosphorous decoxide

11. N2O4
Dinitrogen tetroxide

12. NCI3
Nitrogen trichloride

13. Phosphorous pentabromide
PBr5
Phosphorous pentabromide

14. SiS2
Silicon disulfide

15. Dinitrogen tetraflouride
N2F4
Dinitrogen tetraflouride

16. SeBr2
Selenium dibromide

17. Dichlorine trioxide
Cl2O3

18. Carbon disulfide
CS2

19. diphosphorous pentoxide
P2O5

20. Selenium tetraflouride
SeF4

21. Dichlorine difluoride
Cl2F2

22. Dinitrogen trioxide
N2O3

23. Disulfur trioxide
S2O3