Chemistry-
General
Easy
Question
Fluorine, chlorine, bromine and iodine are placed in the same group (17) of the periodic table, because
- They are non-metals
- They are electronegative
- Their atoms are generally univalent
- They have 7 electrons in the outermost shell of their atom
The correct answer is: They have 7 electrons in the outermost shell of their atom
Electronic configuration of outermost shell of group-17 or halogens are 
.
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