Question

A hydrogen atom is excited from $n=1$ to $n=3$. The amount of energy absorbed by the atom will be

• A. $12.1eV$
• B. $25eV$
• C. $13.6eV$
• D. $-13.6eV$

Answer 1

The correct option is A $12.1eV$

Amount of energy absorbed when a hydrogen atom is excited from $n=$ 1 to n $=3$
$=13.6[1-\frac{1}{9}]eV$
$=13.6\times \frac{8}{9}eV=12.1eV$