1. Molecular Compounds
SNC2D

2. Molecular Compounds
Sometimes non-metals don’t borrow electrons from metals to fill their last shell; instead, they get together and ?

3. Molecular Compounds
Sometimes non-metals don’t borrow electrons from metals to fill their last shell; instead, they get together and share their electrons.

4. Molecular Compounds
Since they are sharing valence electrons, the bond formed between the atoms is called ?

5. Molecular Compounds
Since they are sharing valence electrons, the bond formed between the atoms is called covalent.

6. Molecular Compounds
Since they are sharing valence electrons, the bond formed between the atoms is called covalent.
These compounds can be represented using Lewis dot diagrams: e.g.

7. Molecular Compounds
Or, more commonly, by Kekulé diagrams, where each electron shared is represented by a line connecting the chemical symbols, e.g.:

8. Molecular Compounds
Example:

9. Molecular Compounds
Example:

10. Multiple Bonds
The sharing of more than one electron is represented using more than one line, e.g.:

11. Multiple Bonds
The sharing of more than one electron is represented using more than one line, e.g.:
There is a double bond between the carbon atoms.

12. Naming Molecular Compounds
The elements in the name are given prefixes corresponding to the subscripts (number of atoms) and the second element is given the suffix “-ide.”
e.g. CO2 is carbon dioxide

13. The Prefixes 1 2 3 4 5 6 7

14. The Prefixes
1 Mono-* 2 3 4 5 6 7

15. The Prefixes
1 Mono-*
2 Di- 3 4 5 6 7

16. The Prefixes
1 Mono-*
2 Di-
3 Tri- 4 5 6 7

17. The Prefixes
1 Mono-*
2 Di-
3 Tri-
4 Tetra- 5 6 7

18. The Prefixes
1 Mono-*
2 Di-
3 Tri-
4 Tetra-
5 Penta- 6 7

19. The Prefixes
1 Mono-*
2 Di-
3 Tri-
4 Tetra-
5 Penta-
6 Hexa- 7

20. The Prefixes
1 Mono-*
2 Di-
3 Tri-
4 Tetra-
5 Penta-
6 Hexa-
7 Hepta-

21. The Prefixes 1 Mono-* 2 Di- 3 Tri- 4 Tetra- 5 Penta- 6 Hexa- 7 Hepta-
* The 1st element in the name never need a mono-

22. Examples OF4 N2O Cl2O7 iodine trichloride diphosphorus pentoxide
sulphur hexaiodide

23. Examples OF4 oxygen tetrafluoride N2O Cl2O7 iodine trichloride
diphosphorus pentoxide
sulphur hexaiodide

24. Examples OF4 oxygen tetrafluoride N2O dinitrogen monoxide Cl2O7
iodine trichloride
diphosphorus pentoxide
sulphur hexaiodide

25. Examples OF4 oxygen tetrafluoride N2O dinitrogen monoxide
Cl2O7 dichlorine heptoxide
iodine trichloride
diphosphorus pentoxide
sulphur hexaiodide

26. Examples OF4 oxygen tetrafluoride N2O dinitrogen monoxide
Cl2O7 dichlorine heptoxide
iodine trichloride ICl3
diphosphorus pentoxide
sulphur hexaiodide

27. Examples OF4 oxygen tetrafluoride N2O dinitrogen monoxide
Cl2O7 dichlorine heptoxide
iodine trichloride ICl3
diphosphorus pentoxide P2O5
sulphur hexaiodide

28. Examples OF4 oxygen tetrafluoride N2O dinitrogen monoxide
Cl2O7 dichlorine heptoxide
iodine trichloride ICl3
diphosphorus pentoxide P2O5
sulphur hexaiodide SI6

29. Non-Conventional Names
Some compounds are more commonly known by other names.
e.g. NH3
CH4
H2O

30. Non-Conventional Names
Some compounds are more commonly known by other names.
e.g. NH3 ammonia
CH4
H2O

31. Non-Conventional Names
Some compounds are more commonly known by other names.
e.g. NH3 ammonia
CH4 methane
H2O

32. Non-Conventional Names
Some compounds are more commonly known by other names.
e.g. NH3 ammonia
CH4 methane
H2O water

33. The Diatomic Gases
The elemental compounds like H2, Cl2, and O2. are called diatomic gases and are called simply:
name of element + “gas”
e.g. H2
Cl2 O2

34. The Diatomic Gases
The elemental compounds like H2, Cl2, and O2. are called diatomic gases and are called simply:
name of element + “gas”
e.g. H2 hydrogen gas
Cl2 O2

35. The Diatomic Gases
The elemental compounds like H2, Cl2, and O2. are called diatomic gases and are called simply:
name of element + “gas”
e.g. H2 hydrogen gas
Cl2 chlorine gas O2

36. The Diatomic Gases
The elemental compounds like H2, Cl2, and O2. are called diatomic gases and are called simply:
name of element + “gas”
e.g. H2 hydrogen gas
Cl2 chlorine gas
O2 oxygen gas

37. Activity
“Modelling Molecules”
You need a handout and a modelling kit.