Chemistry · Structure of Atom

JEE Main 2024 — 5 April, Shift 2 — Question 82

In an atom, total number of electrons having quantum numbers $n=4$ , $|m_\ell|=1$ and $m_s=-\frac{1}{2}$ is:

Answer: 6

Numerical answer — enter this value.

Allowed $\ell$ values for $n=4$ are $\ell=0,1,2,3$

$m_\ell=\pm1$ is possible for $\ell=1,2,3$

Each contributes two orbitals.

Total orbitals $= 2+2+2=6$

Each orbital contains one electron with $m_s=-\frac{1}{2}$ .

Total electrons = 6

Answer key and solution verified before publishing.

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