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Write down the electronic configuration ...

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

Text Solution

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(i) `Cr^(3+) (Z=24): 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(3)`
(ii) `Pm^(3+) (Z=61): 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(10) 4p^(6) 5s^(2) 4d^(10) 5p^(6) 4f^(14)`
(iii) `Cu^(+) (Z=29) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10)`
(iv) `Ce^(4+) (Z=58) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(10) 4p^(6) 5s^(2) 4d^(10) 5p^(6)`
(v) `Co^(2+) (Z=27): 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(7)`
(vi) `Lu^(2+) (Z=71) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(10) 4p^(6) 5s^(2) 4d^(10) 5p^(6) 4f^(14) 5d^(1)`
(vii) `Mn^(2+) (Z=25) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(5)`
(viii) `Th^(4+)(Z=90): 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10) 4s^(2) 4p^(6) 4d^(10) 5s^(2) 5p^(6) 4f^(14) 5d^(10) 6s^(2) 6p^(6)`
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