Question

The electron in a hydrogen atom makes a transition from an excited state to the ground state. Which of the following statements is true ?

• A. Its kinetic energy increases and its potential and total energy decrease
• B. Its kinetic energy decreases, potential energy increases and total energy remains the same.
• C. Its kinetic energy and total energy decrease and potential energy increases
• D. Its kinetic, potential and total energies decrease

Answer 1

Answer: (A)

Its kinetic energy increases and its potential and total energy decrease

Answer 2

K.E. = $\frac { 1 } { 2 }$ $\frac{kze^{2}}{r}$ Ž U = – $\frac{kze^{2}}{r}$

Ž E = $\frac{1}{2}\frac{kze^{2}}{r}$

nÆ rÆ