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Difficulty of Carbon to Form a Stable Ion

Which of the ...

Question

Which of the following has the lowest number of electrons in the valence shell?

A

O

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B

Cl

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C

N

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D

B

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Solution

The correct option is D
B

Boron (B) has 3 electrons in the valence shell. Its electronic configuration is 2,3 and atomic number is 5. Whereas oxygen has 6, chlorine has 7 and nitrogen has 5 electrons in the outermost shell.

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