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Write electron configurations and count the number of unpaired electrons in: O, Si, Ni, I, Ir,...

Write electron configurations and count the number of unpaired electrons in: O, Si, Ni, I, Ir, Bi, Gd

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Answer #1

Oxygen O(8) : 1s2 2s2 2p4
No of unpaired electrons= 2

Silicon Si(14) : 1s2 2s2 2p6 3s2 3p2
No of unpaired electrons= 2

Nickel Ni(28) : 1s2 2s2 2p6 3s2 3p6 4s2 3d8 which becomes 4s0 3d10
No of unpaired electrons= 0

Iodine I(53) : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p5
No of unpaired electrons= 1

Iridium Ir(77): 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d7
No of unpaired electrons= 3

Bismuth Bi(83): 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p3
No of unpaired electron= 3

Gadolinium Gd(64) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f8
No of unpaired electrons= 6

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