| 1. | |
| a) | molecules composed of only two atoms (covalently bonded) |
| b) | hydrogen/ nitrogen/ oxygen/ fluorine/ chlorine/ bromine/ iodine |
| 2. | |
 |
| 3. | a) | N2 | b) | Al | c) | H2 |
| d) | Cl2 | e) | Br2 | f) | H2O | |
| g) | CCl4 | h) | NF3 | i) | SiBr4 | |
| j) | SiO2 | k) | SiO2 | l) | N2O4 |
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