Question

Determine the no. of neutrons in the radioactive isotope of hydrogen.

• A. 0
• B. 1
• C. 2
• D. 3

Answer 1

The correct option is C 2

Tritium is radio active isotope of hydrogen ${}_1{H}^3$.
$A=3,Z=1$
$n=A-Z=3-1=2$ neutrons.