Question

The atoms of different elements having same mass number, but different atomic numbers are called:

• A. Isotopes
• B. Isotones
• C. Isobars
• D. None of these

Answer 1

The correct option is C

Isobars

The explanation for the correct option

C. Isobars

1. Isobars: Isobars are atoms of different chemical elements that have the same number of nucleons (sum of protons and neutrons). In isobars, the mass number of the elements is the same but the atomic numbers are different.
2. So the atoms of different elements have the same mass number, but different atomic numbers are called: isobars

The explanation for the incorrect options

A. Isotopes

Isotopes can be defined as the variants of chemical elements that possess the same number of protons and electrons, but a different number of neutrons.

B. Isotones

Isotones are atoms that have the same neutron number but different proton numbers.

D. None of these

From the above explanation, option D is incorrect.

Thus, C is the correct option.