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Electron Gain Enthalpy

A neutral ato...

Question

A neutral atom of an element has 2K, 8L, 9M and 2N electrons. The atomic number of element is :

A

20

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B

21

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C

22

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D

23

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Solution

The correct option is B 21
A neutral atom of an element has 2K, 8L, 9M, and 2N electrons.

The atomic number of element is $2 + 8 + 9 + 2 = 21$ .

So, the correct option is $B$

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