Question

What is atom?

What is molecule?​

Answer 1

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An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge

Answer 2

Answer:

atom - atom is a unit of a element which cannot be devided into other parts.

molecule - group of two or more elements