Question

Which of the following statements is/are correct regarding a hydrogen atom?

• A. Kinetic energy of the electron is maximum in the first orbit
• B. Potential energy of the electron is maximum in the first orbit
• C. Radius of the second orbit is four times the radius of the first orbit
• D. Various energy levels are equally spaced

Answer 1

Answer: (A), (C)

The correct options are
A Kinetic energy of the electron is maximum in the first orbit
C Radius of the second orbit is four times the radius of the first orbit

We know,

$\Rightarrow KE\propto \frac{1}{n^2}$

So, kinetic energy is maximum in 1st orbit.

${\left(Radius\right)}_n\propto \frac{n^2}{z}$

$r_2=k\left(4\right);r_1=k\left(1\right)$

$\therefore$ Radius of the second orbit is $4$ times the first orbit