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ChemistryChemistry
12 March, 02:04

Which element has 3 valence electrons in the 4d sublevel?

A. V

B. Nb

C. Cu

D. Tl

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Answers (1)
  1. 12 March, 02:31
    0
    Nb, the transition metal (d) subshell will always be n-1, meaning the 3d subshell will be in row (period) 4. So if it’s 4d then it is row (period) 5, and if it has 3 valence electrons then the element is located in column V, or the third column in the transition metal section.
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