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19 May, 05:00

When chromium loses two electrons, its configuration changes to A. [Ar]4s13d5. B. [Ar]3d4. C. [Ar]4s13d4. D. [Ar]4s1.

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  1. 19 May, 05:21
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    Chromium has the electron configuration [Ar]4s13d5 and exhibits oxidation numbers 2+, 3+, and 6+. When chromium loses two electrons, it forms the Cr2 + ion and has the configuration [Ar]3d4.

    The Answer is B. [Ar]3d4
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