Question

The number of electrons in an atom $X$ of atomic number $Z$ and mass number $A$is

Answer 1

Atomic number

• The number of protons present in the nucleus is equal to the atomic number.
• The atomic number is represented as Z.

Formula for atomic number

• The formula for atomic number is as follows:-

$\text{Atomic number}\left(\text{Z}\right)\text{= number of protons in the nucleus of an atom = number of electrons in a neutral atom}$

Number of electrons

• The number of electrons in an atom is $Z$.