Question

how it is denotes number of atom ?

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with pictures ,for better understand .​

Answer 1

Explanation:

The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus. In an uncharged atom, the atomic number is also equal to the number of electrons. The sum of the atomic number Z and the number of neutrons N gives the mass number A of an atom.

Answer 2

Explanation:

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