1.

The geometry ion which hs no d electrons in the central metal atom is : [Atomic number Cr=24, Mn=25, Fe=26, Co=27]

Answer»

`[MnO_(4)]^(-)`
`[Co(NH_(3))_(6)]^(3+)`
`[Fe(CN)_(6)]^(3-)`
`[Cr(H_(2)O)_(6)]^(3+)`

SOLUTION :`MnO_(4)^(-) implies Mn implies + 7 `
`d^(@)` CONFIGURATION


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