Question

what is define of atom​

Answer 1

Answer:

Definition of atom.

The atom is defined as the smallest particle which is indivisible. It may or may not have an Independent existence but it can take part in chemical reaction. Example - Oxygen atom, Hydrogen atom and so on.

Explanation:

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Answer 2

Answer:

An atom is the smallest constituent unit of ordinary matter that constitutes a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.