| 1. | |
| a) | molecules composed of only two atoms (covalently bonded) |
| b) | hydrogen/ nitrogen/ oxygen/ fluorine/ chlorine/ bromine/ iodine |
| 2. | |
 |
|
| 3. | O2-, Na+ |
| 4. | |
| a) | highest concentration of reactants/ as reaction proceeds reactants are used up |
| b) | |
| Lower temp: curve to right, should flatten off. no higher than original. | |
| Powder: curve to left, should level no higher original. |
| 13. | a) | N2 | b) | Al | c) | H2 |
| d) | Cl2 | e) | Br2 | f) | H2O | |
| g) | CCl4 | h) | NF3 | i) | SiBr4 | |
