Question

Kinetic energy of an electron in the first Bohrs orbit of the hydrogen atom is :

• A. $-6.5eV$
• B. $+13.6eV$
• C. $-29.6eV$
• D. $-13.6eV$

Answer 1

Answer: (D)

As it is clear that the kinetic energy of electron in the first Bohr orbit of the hydrogen atom is given by
$K=-\frac{13.6}{n^2}$
$=-\frac{13.6}{(1{)}^2}=-13.6eV$