1.

Ce (Z=588) andYb (Z= 70)exhibitsstable+4and +2oxidationstatesrespectively . Thisisbecause

Answer»

`Ce^(4+)` and `YB^(2+)` ACQUIRE `f^(7)` configuration
`Ce^(4+)` and `Yb^(2+)` acquire`f^(0)` configuration
`Ce^(4+)` and `Yb^(2+)` acquire `f^(7)` and `f^(14)` configuration
`Ce^(4+)` and `Yb^(2+)` acquire `f^(0)` and `f^(14)` configuration

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