Question

Atoms of the same element with different mass numbers are called .

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

Answer 1

The correct option is A isotopes

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

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

Isotopes are defined as the atoms of the same element, having the same atomic number but different mass numbers.

For example, protium, deuterium and tritium are isotopes of hydrogen.