Question

Atoms with same mass numbers but different atomic number are called .

• A. isotopes
• B. isomers
• C. isobars

Answer 1

The correct option is C isobars

Mass number is the total number of protons and neutrons present in the nucleus of an atom.

Atomic number is the total number of protons present in the nucleus of an atom.

Isobars are defined as the atoms having the same mass number but different atomic numbers.

For example, ${}_{18}^{40}Ar$ and ${}_{19}^{40}K$ are isobars.