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Question

Which of the following group of elements does not have same valence shell electrons?

A
Na, K, Rb
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B
Be, Mg, Ca
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C
F, Cl, Br
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D
C, N, P
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Solution

The correct option is D C, N, P
Carbon has 4 electrons in its outermost shell. nitrogen and phosphorous both have 5 electrons in its outermost shell.

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