In Cr2+ ions, the number of d electrons present are

The atomic number of Cr = 24 This means chromium contains 24 electronsNow, The electronic configuration of chromium; [Ar]3d54s1Electronic configuration of Cr2+: [Ar]3d44s0Therefore, Cr2+ has 4 d-electrons.

In Cr2+ ions, the number of d electrons present are

The atomic number of Cr = 24 This means chromium contains 24 electronsNow, The electronic configuration of chromium; [Ar]3d54s1Electronic configuration of Cr2+: [Ar]3d44s0Therefore, Cr2+ has 4 d-electrons.

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In Cr²⁺ ions, the number of d electrons present are

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answer is C.

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Detailed Solution

The atomic number of Cr = 24
This means chromium contains 24 electrons
Now,
The electronic configuration of chromium; [Ar]3d⁵4s¹
Electronic configuration of Cr²⁺: [Ar]3d⁴4s⁰
Therefore, Cr²⁺ has 4 d-electrons.

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