Question

The angular momentum of an electron in hydrogen atom is 4h/2p. Kinetic energy of this electron is –

• A. 4.35 eV
• B. 1.51 eV
• C. 0.85 eV
• D. 13.6 eV

Answer 1

Answer: (C)

0.85 eV

Answer 2

$\frac{nh}{2\pi} = \frac{4h}{2\pi}$

n = 4

K.E. in 4^th orbit Ž 0.85 eV