Problem: From a consideration of electronic configurations, which of the elements indicated below would be classified as a  transition element?a) 1s2, 2s2, 2p2b) 1s1, 2s2, 2p6, 3s1, 3p5c) 1s2, 2s2, 2p6,  3s2, 3p6, 4s2d) 1s2, 2s2, 2p6, 3s2, 3p6,3d5, 4s2e) 1s2, 2s2, 2p6, 3s2, 3p6,3d10, 4s2, 4p6

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From a consideration of electronic configurations, which of the elements indicated below would be classified as a  transition element?

a) 1s2, 2s2, 2p2

b) 1s1, 2s2, 2p6, 3s1, 3p5

c) 1s2, 2s2, 2p6,  3s2, 3p6, 4s2

d) 1s2, 2s2, 2p6, 3s2, 3p6,3d5, 4s2

e) 1s2, 2s2, 2p6, 3s2, 3p6,3d10, 4s2, 4p6

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