1.

Which statements are correct for the peroxide ion?

Answer»

It has five completely filled anti-bonding molecular orbitals.
It is diamagnetic
it has BOND order one
it is isolectronic with neon

Solution :`O_(2)^(2-)(18):(sigma1s)^(2):(sigma1s)^(2)(sigma*1s)^(2)(sigma2s)^(2)(sigma*2s)^(2)`
`(sigma2p_(Z))^(2)(pi2p_(x))^(2)(pi2p_(y))^(2)(pi*2p_(x))^(2)(pi*2p_(y))^(2)`
`:.` No. unpaired electrons = diamagnetic
BORDER order `=(10-8)/2=1`


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