The halogen having five vacant orbitals in the outermost shell belongs to
The halogen having five vacant orbitals in the outermost shell belongs to
A. 3rd period
B. 4th period
C. 2nd period
D. 5th period
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Correct Answer - A
Five vacant orbitals (3d-level) are present in Cl `(1s^2 2s^2 2p^6 3s^2 3p^5)` which belongs to 3rd period.
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