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Question

How many electron in a given atom can have the following quantum numbers? n=3,l=2,m=+2,s=+1/2

A
1
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B
18
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C
14
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D
7
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Solution

The correct option is A 1
Only one electron in a given atom can have the set of quantum numbers given in the question.

Explanation:
No two electrons in an atom can have the same set of quantum numbers.

The first quantum number is the principle quantum number , which is
n=3
This means the electron is in the third energy level (shell).

The second quantum number, the angular momentum , is
l=2
and means the electron is in the
d sublevel (subshell).

The third quantum number, the magnetic quantum number ,
ml=2
represents one of the five
3d orbitals.
Lastly, we have the spin quantum number ,
ms=+1/2
It indicates the direction of the spin of the electron.

1107585_1099846_ans_529c985415c045ffb119adb26e7891e8.jpg

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