Question

Fill in the blanks

1. The smallest unit of any chemical element is called......
2. Reaction in which heat is absorbed is called.........
3. Covering iron surface with zinc is called........
4. The chemical symbol of carbon is .........
5. The purest solid form of a substances with a definite geometrical shape is called ....... ​

Answer 1

Explanation:

1. atom

2. endothermic reaction

3 Galvanisation method

4. C

5. crystal

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