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Question: Answered & Verified by Expert
Maximum number of electrons in an orbit of an atom is determined by
( $\mathbf{n}$ = Orbit Number)
PhysicsAtomic PhysicsJEE Main
Options:
  • A $2 \mathrm{n}$
  • B $2 n^2$
  • C $(2 n+1)$
  • D $n$
Solution:
1503 Upvotes Verified Answer
The correct answer is: $2 n^2$
The number of electrons in an orbit is obtained by $2 \times \mathrm{n}^2$, where $\mathrm{n}$ is the number of orbits.
For example: Number of electrons in K shell i.e., in $1^{\text {st }}$ orbit can be obtained as follows :-

Here $n=1$, by using $2 \times n^2$ we get maximum number of electrons in K-shell i.e., $1^{\text {st }}$ shell $=2$.

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