Question

The atoms of same element having same atomic number, but different atomic masses are called:

Options

• isotopes

• isobars

• isotones

• both isotopes and isobars

Answer 1

Isotopes

Explanation:

Atoms of the same element having the same atomic number but different mass numbers are called isotopes. The difference in mass is caused by a different number of neutrons in the nucleus. Isobars have different atomic numbers but the same mass number, while isotones have the same number of neutrons but different protons.