Class 11 NEET Chemistry Chemical Bonding And Molecular Structure Part 1

The total charge =−3
So the average formal charge on each 'O' atom is −3/4=−0.75
Again total no. of electrons in the valence shell of PO43− ion =5+8=13
No. of electrons involved in bond formation in PO43− ion =13−3=10
PO43− ion =13−3=10
No. of bonds in PO43−=‌

10

2

=5
⇒ Average P−O bond order =‌

5

4

=1.25