The maximum no. of electrons having parallel spin in the configuration $4 s^{2} 4 p^{5}$ are:

7

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4

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3

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5

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Solution

The correct option is A $4$
Configuration is $4 s^{2} 4 p^{5}$ .
Therefore, the s orbital electrons is paired and two of the orbitals in p subshell are fully filled.
Therefore, the coniguration is like $4 s^{2} 4 p_{x}^{2} 4 p_{y}^{2} 4 p_{z}^{1}$ .

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