Question

Q. Why number of proton is used to decide the atomic number of an element ?​

Answer 1

Answer:

The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. ... The sum of the atomic number Z and the number of neutrons N gives the mass number A of an atom.

Explanation:

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Answer 2

Answer:

Proton contribute to the mass of an atom and provide positive charge to the nucleus. The number of protons also determines the identity of an element . Since the atom is electrically neutral , the number of electron must equal the number of protons.

Explanation:

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