Question
The elements with atomic numbers $9, 17, 35, 53, 85$ are all
✓
Answer
b
$(b)$ These atomic no. gives the configuration $n{s^2}n{p^5}$ which are of halogen group or $VII^{th}$ group.
$(b)$ These atomic no. gives the configuration $n{s^2}n{p^5}$ which are of halogen group or $VII^{th}$ group.
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