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Which one of the elements with the following outer orbital configuration

Which one of the elements with the following outer orbital configuration may exhibit the largest number of oxidation states

Options

(a) 3d⁵4s¹
(b) 3d⁵4s²
(c) 3d²4s²
(d) 3d³4s²

Correct Answer:

3d⁵4s²

Explanation:

Greater the number of valence electrons, more will be the number of oxidation states exhibited by the element. 3d⁵4s¹, can show a maximum of 6 oxidation states. 3d⁵4s², can show a maximum of 7 oxidation states. 3d²4s² can show a maximum of 4 oxidation states. 3d³4s² can show a maximum of 5 oxidation states.

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