# Which quantum number determines the number of angular nodes in an atomic orbital?

1. A

n

2. B

l

3. C

${\mathrm{m}}_{\mathrm{I}}$

4. D

${\mathrm{m}}_{\mathrm{s}}$

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### Solution:

The quantum number determines the number of angular nodes in an atomic orbital is l.

The entire description of a particular electron belonging to an atom may be expressed in terms of four quantum numbers, which are: Principal quantum number, indicated by the letter n. l stands for the azimuthal quantum number, also known as the orbital angular momentum quantum number.

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