Question

As we move away from the nucleus, in atom the potential energy of electron increases, the total energy as a whole increases. But what happens to the kinetic energy of the electron?

Answer 1

Kinetic energy of electron $\alpha$ $V^2$.

Velocity of an electron at $n^{th}$ level$=V_{0}X\frac{z}{n}$

Where $V_0=$ velocity of electron in ground state of hydrogen atom.

$\therefore$ Kinetic energy of electron $\alpha \frac{1}{n^2}$.

As the distance for nucleus increases, the value of $n$ increases. Consequently the kinetic energy of the electron decreases as distance from the nucleus increases.