Question

Define the following:

(a) Atomic number

(b) Atomic mass

(c) Isobars.

Answer 1

a. Atomic number:

The number of protons present in an atom is called its atomic number. It is represented by the symbol: Z.

b. Atomic mass:

Atomic mass is the sum of the total number of protons and neutrons present in the nucleus of an atom.

c. Isobars: 

Isobars are the atoms of different elements having a different atomic number but the same mass number.