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Multiple choice

Which of the following first row transition metal ions has the least number of unpaired electrons?

  1. Fe2+

  2. Co2+

  3. Ni2+

  4. Cu2+

  5. Cr2+

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cu2+: [Ar] 3d9; 1 unpaired electron

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