Question

Total energy of electron in an excited state of hydrogen atom is $-3.4eV$. The kinetic and potential energy of electron in this state

• A. $K=-3.4eV$ $U=-6.8eV$
• B. $K=3.4eV$ $U=-6.8eV$
• C. $K=-6.8eV$ $U=+3.4eV$
• D. $K=+10.2eV$ $U=-13.6eV$

Answer 1

The correct option is B $K=3.4eV$ $U=-6.8eV$

Total energy of electron, $T=-3.4eV$ (Given)

Kinetic energy of electron, $K=|T|=3.4eV$

Potential energy of electron, $U=2T=-6.8eV$