Question

Energy required for the electron excitation in $L{i}^{++}$ from the first to the third Bohr orbit is

• A. $122.4eV$
• B. $12.1eV$
• C. $36.3eV$
• D. $108.8eV$

Answer 1

Answer: (D)

$E=-13.6(3{)}^2\left[\frac{1}{3^2}-\frac{1}{1^2}\right]$
$=13.6\times 9\times \frac{8}{9}$
$=108.8eV$