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Which of the following ions has a d5 configuration?

Practice Questions

Q1
Which of the following ions has a d5 configuration?
  1. Mn2+
  2. Fe3+
  3. Cr3+
  4. V4+

Questions & Step-by-Step Solutions

Which of the following ions has a d5 configuration?
  • Step 1: Understand what a d5 configuration means. It means there are 5 electrons in the d orbital.
  • Step 2: Identify the element that has a d5 configuration in its ion form. We will look for manganese (Mn).
  • Step 3: Determine the electron configuration of neutral manganese (Mn). It is [Ar] 4s2 3d5.
  • Step 4: When manganese loses 2 electrons to become Mn2+, it loses the 2 electrons from the 4s orbital first.
  • Step 5: After losing 2 electrons, the electron configuration of Mn2+ becomes [Ar] 3d5.
  • Step 6: Since Mn2+ has 5 electrons in the d orbital, it has a d5 configuration.
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