Question

What is meant by the atomic number (Z) of an element?

Answer 1

The number of protons present in any atom is known as atomic number.

In general, the atomic number or proton number (symbol Z) of a chemical element is the number of protons that also found in the nucleus of an atom.

Uncharged atom, the atomic number is equal to the number of electrons.

Answer 2

Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. ... Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.