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One possible answer13 is the only Prime number in this group

Incorrect 2 is a prime number also

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How about 15 as the only number having different prime factors? I admit that is tenuous, but I cannot do better.

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Q: Which number in this group does not belong and why 15 13 16 2 8?
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What chemical group does white phosphorous belong to?

Phosphorous belong to group 15 of the periodic table.


Does nitrogen belong to the halogen group?

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5a,i hope that's what you were looking for


Which group does nitrogen belong in?

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How do you figure out how many electrons are in groups 13-18?

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What number doesn't belong 15 2 8 13 16?

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