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Question

What are the similarities in properties of elements in Halogen family?


Solution

All in this group are characterized by the presence of $$7e^-$$ in an outer shell, and hence have the ability to gain an $$e^-$$ to form negative ions w/ a completed octet of valence $$e^-$$.

All these elements share traits of being very reactive and in particular form substitution compounds w/ numerous organic compounds. 

Although these elements also have other valences all have a $$-1$$ valence in common.



Chemistry

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