Atoms having the same number of neutrons but different mass number are called

Question

Question

Answer 1

The correct answer is isotones.

Key Points

The nuclei have been classified based on the number of protons (atomic number) or the total number of nucleons (mass number) as follows:

Isotopes	Isobars	Isotones	Isotherms
The atoms of an element having the same atomic number but a different mass number are called isotopes. All isotopes have the same chemical properties.	The nuclei which have the same mass number (A) but a different atomic number (Z) are called isobars. Isobars occupy different positions in the periodic table so all isobars have different chemical properties.	The nuclei having an equal number of neutrons are called isotones. For them both the atomic number (Z) and mass number (A) are different, but the value of (A – Z) is the same.	Isotherms are lines on a weather map that connects points of equal temperature.

EXPLANATION:

From the above, it is clear that atoms having the same number of neutrons but a different mass number are called isotones. Therefore option 3 is correct.