1.

Thegeneralelectronicconfigurationof 4f - seriesof elementscan bewriteenas "_____"

Answer»

`[Xe] 4s^(2-14) 5D^(0-4)6S^(2)`
`[Xe] 4f^(2-14)5d^(0-4)6s^(1)`
`[Xe] 4f^(1-14)5d^(0)6s^(1)`
`[Xe ] 4f^(2-14) 5d^(0-4)6s^(1)`

Answer :A


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