MCQ
The orbital angular momentum of an electron in $s$ orbital is
  • A
    $ + \frac{1}{2}.\frac{h}{{2\pi }}$
  • Zero
  • C
    $\frac{h}{{2\pi }}$
  • D
    $\sqrt 2 .\frac{h}{{2\pi }}$

Answer

Correct option: B.
Zero
b
(b) For $2s$ orbital, $l = 0$; azimuthal quantum number is not show angular momentum for the $2s$ orbitals.

Angular momentum $ = \sqrt {l(l + 1)} \frac{h}{{2\pi }} = 0$.

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