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Write down the electronic configuration ...

Write down the electronic configuration of: ltBrgt (i) `Cr^(3+)`
(ii) `Pm^(3+)`
(iii)`Cu^(+)`
(iv) `Ce^(4+)`
`Co^(2+)`
(vi) `Lu^(2+)`
(vii) `Mn^(2+)`
(viii) `Th^(4+)`

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