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Number of Elements in a Period

What is the c...

Question

What is the common feature of the electronic configuration of the element in group 7.

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Solution

Group 7 of the periodic table is known as halogens: Fluorine, Chlorine, Bromine, Iodine, and Astatine.
In Group 7 all the elements have 5 electrons in their outermost shell, they all need 3 electrons to complete their octet.

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