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Valency PCl2O7
Accepted Answer
The valency of phosphorus (P) in PCl₂O₇ is +7. Here's why:
Chlorine (Cl) is a halogen and typically has a valency of -1.
Oxygen (O) is in Group 16 of the periodic table and has a valency of -2.
To balance the charges, phosphorus must have a valency of +7. Here's the breakdown:
2 chlorine atoms: 2 x (-1) = -2
7 oxygen atoms: 7 x (-2) = -14
Overall negative charge: -2 - 14 = -16
To neutralize this, phosphorus must have a +16 charge, making its valency +7.
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