Question

what is atom

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Answer 1

Answer:

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

Electric charge: zero (neutral), or ion charge

Components: Electrons and a compact nucleus of protons and neutrons

Diameter range: 62 pm (He) to 520 pm (Cs) (data page)

Mass range: 1.67×10−27 to 4.52×10−25 kg

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Answer 2

Answer:

An atom is the smallest or basic or fundamental unit or building block of matter .