Question

What is an atom ? How big are atom ​

Answer 1

Answer:

Atoms are extremely small, typically around 100 picometers across. They are so small that accurately predicting their behavior using classical physics—as if they were tennis balls, for example—is not possible due to quantum effects. Every atom is composed of a nucleus and one or more electrons bound to the nucleus.

Explanation:

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Answer 2

Answer:

atoms are very small, they are smallest thing . more than millions of atoms when stacked would make a layer barely as thick as this sheet of paper. And we can't seen with our naked eyes