Question

Which among the following represents a set of isotopes? Atomic nuclei

containing:

I. 20 protons and 20 neutrons

II. 21 protons and 19 neutrons

III. 22 neutrons and 18 protons

IV. 20 protons and 22 neutrons

V. 21 protons and 20 neutrons​

Answer 1

Bit 1

Explanation:

Bit 1 is the Correct answer i.e. 20 Protons and 20 Neutrons

Answer 2

I and IV and II and V represent a set of isotopes.

• The elements which contain the same number of protons but a different number of neutrons are called isotopes.
• The atomic nuclei I and IV contain the same number of protons but different numbers of neutrons. So, I and IV are isotopes.
• The atomic nuclei II and V contain the same number of protons but different numbers of neutrons. So, II and V are isotopes.