Question

Answer the following questions-

1)What are atoms?
2) What are molecules?

Answer 1

Atom is the smallest unit of matter.

Two or more than two atom after combining makes a molecoule

Answer 2

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Hardness is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion. Some materials (e.g. metals) are harder than others (e.g. plastics, wood).

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