If Atom $1$ has 19 protons and 22 neutrons and Atom $2$ has 20 protons and 22 neutrons, are these isotopes of the same element?

Question 07

Two atoms are said to be isobars if ?

(a) They have same atomic number but different mass number

(b) They have same number of electrons but different number of neutrons

(c) They have same number of neutrons but different number of electrons

(d) Sum of the number of protons and neutrons is same but the number of protons is different

Isotopes have same number of protons but different number of neutrons.

Deuterium and tritium have the same number of protons and a different number of neutrons in each atom.