First slide

Quantum mechanical model of the atom

Question

Select the correct statement for electron denoted by n = 4 and m = -2:

Moderate

A

It may be in a d-orbital
B

It is present in N-shell
C

It electron may be in a p-orbital
D

$The electron must have the spin quantum number = + \frac{1}{2}$

Solution

n=4 means electron is present electron is present in 4th shell
m=2 means electron may present in d or f orbital.
We cant determine the spin of electron with given data.
Hence options A & B are correct..

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