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The number of unpaired electrons present in [Cr(NH3)6]3+ is ______. - Chemistry (Theory)

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Question

The number of unpaired electrons present in [Cr(NH3)6]3+ is ______.

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Solution

The number of unpaired electrons present in [Cr(NH3)6]3+ is 3.

Explanation:

For the complex [Cr(NH3)6]3+:

  • Chromium (Cr) has atomic number 24.
  • In Cr3+, the configuration is [Ar] 3d3.
  • NH3 is a moderate field ligand, so it does not pair the 3d electrons.

Thus, Cr3+ has 3 unpaired electrons.

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