Question

Tritium contains ____ neutrons.

• A. 4
• B. 3
• C. 2
• D. 1

Answer 1

Answer: (C)

2

Atomic mass of tritium is 3 and atomic number is 1. Hence, the number of neutrons in it are (3-1) $=2$

${}_1^{3}H\to 2$ neutron $+$ $1$ proton.