Question

What is the potential energy of the electron in the L-shell of the hydrogen atom?

• A. $-13.6eV$
• B. $-6.8eV$
• C. $-10.2eV$
• D. $-3.4eV$

Answer 1

The correct option is B $-6.8eV$

We know,
Potential energy = 2$\times$Total energy
Total energy of L shell $(n=2)=-\frac{13.6}{n^2}eV=-\frac{13.6}{4}eV=-3.4eV$

Therefore,
$\text{Potential energy}=2\times (-3.4)=-6.8eV$