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Q.

Which element has 7 valence electrons in their outermost shell?

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a

Bromine

b

Chlorine

c

Fluorine

d

All of the above

answer is D.

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Detailed Solution

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Fluorine, chlorine, bromine, and iodine have the same number of valence electrons as they belong to the same group.

The number of valence electrons is equal to the group number. As F, Cl, Br, and I belong to the 7th group so their valence electrons are 7.

 

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