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Why maximum covalency of PCl5 is 6 as PCl6- Why it can`t be 9?

Why maximum covalency of PCl5 is 6 as PCl6- Why it can`t be 9?

Grade:12

1 Answers

Vikas TU
14149 Points
6 years ago
P has a valency of 3 
Clarification: 
P has 5 electrons in the external generally shell. So keeping in mind the end goal to be steady it will either free 5 electrons or pick up 3 electrons by taking after octet run the show. Subsequently it is a non metal and non metals tend to pick up electrons. 
so P pick up 3 electrons to procure the honorable has setup. 
It moves toward becoming P^-3 1s^2 2s^2 2p^6 3s^2 3p^6 

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