Question

1. A metal which is brittle.
2. A non-metal which is a good conductor of electricity.
3. The hardest naturally occurring substance.
4. The most ductile metal.
5. A gaseous non-metal. 
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Answer 1

Explanation:

The most suitable choices for the above statements are given below:

(1) Zinc

(2) Graphite

(3) Diamond

(4) Gold

(5) Oxygen