Q. The energy of an electron in ground state in a hydrogen atom is $- 13.6 e V$ . If the value of $E_{n} = - 1.5 e V, n$ corresponds to the value:

2087 174 Structure of Atom Report Error

A

4

10%

B

3

68%

C

2

12%

D

1

9%

Solution:

$\frac{- 13.6}{n ^{2}} = - 1.5$

Therefore, $n = 3$