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Write down the electronic configuration ...

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

Text Solution

Verified by Experts

(i) `Cr^(3+) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(3)`
Or, `[Ar]^(18) 3d^(3)` (ii) `Pm^(3+) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10) 4s^(2) 4p^(6) 4d^(10) 5s^(2) 5p^(6) 4f^(4)`
Or, `[Xe]^(54) 3d^(3)`
(iii) `Cu^(+) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10)` Or, `[Ar]^(18) 3d^(10)`
(iv) `Ce^(4+) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10) 4s^(2) 4p^(6) 4d^(10) 5s^(2) 5p^(6)` Or, `[Xe]^(54)`
`Co^(2+) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(7)`
Or, `[Ar]^(18) 3d^(7)`
(vi) `Lu^(2+) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(6) 3d^(10) 4s^(2) 4p^(6) 4d^(10) 5s^(2) 5p^(6) 4f^(14) 5d^(1)`
Or, `[Xe]^(54) 2f^(14) 3d^(3)`
(vii) `Mn^(2+) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(5)`
Or, `[Ar]^(18) 3d^(5)`
(viii) `Th^(4+) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10) 4s^(2) 4p^(6) 4d^(10) 4f^(14) 5s^(2) 5p^(6) 5d^(10) 6s^(2) 6s^(6)`
Or, `[Rn]^(86)`
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