Question

In a hydrogen atom, the electron has angular momentum given by $L=n\frac{h}{2\pi }$. Here, $n$ is,

• A. always an integer
  
• B. maybe an integer or fraction
  
• C. rational number
  
• D. real number
  

Answer 1

The correct option is A always an integer


Angular momentum of an electon in hydrogen atom is given as:
$L=\frac{nh}{2\pi }$

Here, $n$ is the principle quantum number of the electron, which always is an integer.

Hence, $\left(A\right)$ is the correct answer.

$$\begin{array}{c}\text{Why this Question ?}\\ \text{This question is based on Bohr's}{2}^{\text{nd}}\text{postulate and will clear the concept of angular momentum of an electron.}\end{array}$$