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Quantum Number

The total num...

Question

The total number of orbitals associated with the principal quantum number 5 is :

A

25

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B

5

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C

10

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D

20

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Solution

The correct option is D 25
The number of orbitals associated with principal quantum number N is $N^{2} = 5^{2} = 25$ .

The total number of orbitals associated with the principal quantum number 5 is 25.

Hence, the correct option is $A$

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