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UPSC NDA I and II 2020 General Ability Solved Paper

Question : 72 of 150

Marks: +1, -0

The number of maximum electrons in N shell is

Solution:

Concept:

Maximum electrons in a shell is given by the formula

2n^{2}

, where

n

is the principal quantum number (shell number).

Explanation:

The N shell corresponds to

n = 4

Using the formula: maximum electrons =

2 \times (4)^{2} = 2 \times 16 = 32

Thus, the N shell can hold up to 32 electrons.

Answer:

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