Question

which element do not have variable oxidation State in 3d series?​

Answer 1

Explanation:

$\mathbb{</strong><strong>Answer</strong><strong>}$

➡️Scandium

$\mathbb{</strong><strong>Reason</strong><strong>}$

➡️➡️Scandium (having an electron configuration of 4s2 3d1) does not exhibit variable oxidation states. This is due the fact that Scandium looses its single/one electron in its d subshell/orbital and gains an "extremely stable" noble gas configuraion.✔️✔️✔️

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Answer 2

Answer:

Scantium shows only +3 oxidation state and zic shows only +2 oxidation state