Two atoms are said to be isobars if.
Two atoms are said to be isobars if.

(i) they have the same atomic number but a different mass number.

(ii) they have the same number of electrons but a different number of neutrons.

(iii) they have the same number of neutrons but a different number of electrons.

(iv) the sum of the number of protons and neutrons is the same but the number of protons is different.

 

 

Correct Answer: (iv) the sum of the number of protons and neutrons is the same but the number of protons is different

Explanation: When the Sum of the number of protons and neutrons is equal but the number of protons is different, and these atoms are called isobars.