Question

what is a atom? what does it contains​

Answer 1

Answer:

I don't know this

Explanation:

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Answer 2

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Explanation:

Atoms consist of three basic particles:protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).