Question

The sum of number of neutrons and protons in all the isotopes of hydrogen is :

• A. 2
• B. 4
• C. 5
• D. 6

Answer 1

The correct option is D 6

Hydrogens has three isotopes ${}_1{H}^1{,}_1{H}^2$ and ${}_1{H}^3$.

The sum of number of neutrons and protons in all the isotopes of hydrogen.

$1^{H^1}$ $1^{H^2}$ $1^{H^3}$

$p=$ $1$ $1$ $1$

$\underset{–}{n=012}$

$1$ $+$ $2$ $+$ $3$ $=$ $6$