1. _______ is a liquid metal.

2. _________ is a non-metal which is a good conductor of electricity.

3. ________ is a soft metal.

4. When a metal reacts with oxygen in the presence of moisture and deteriorates, it is called _____________.

5. Copper forms a green layer of ___________ on exposure to moist air.

6. Rust is _________.

7. The rate of rusting ___________ with an increase of acidic gases.

8. The process of applying a thin layer of Zinc metal on iron objects is called

9. The lower parts of bridges and ships are coated with ________.

10. A mixture of iron or steel with silicates is called __________.