Question

The nucleus of tritium contains neutrons

• A. 4
• B. 3
• C. 1
• D. 2

Answer 1

The correct option is D

2

Isobar

has the same atomic number but a different atomic mass.

Example

Hydrogen, Deuterium Tritium

The explanation for the Correct answer

• Tritium (${\mathrm{H}}_1^3$) is the only radioactive isotope of hydrogen.
• The nucleus of a tritium atom consists of a proton and two neutrons.
• This contrasts with the nucleus of an ordinary hydrogen atom (which consists solely of a proton) and a deuterium atom (which consists of one proton and one neutron).

There fore the correct option is (B) two.