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Which of the following elements has an incomplete d subshell?

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Question: Which of the following elements has an incomplete d subshell?

Options:

  1. Sc
  2. Ti
  3. V
  4. Cr

Correct Answer: Cr

Solution: 

Chromium (Cr) has an electronic configuration of [Ar] 4s1 3d5, which means it has an incomplete d subshell.

Which of the following elements has an incomplete d subshell?

Practice Questions

Q1
Which of the following elements has an incomplete d subshell?
  1. Sc
  2. Ti
  3. V
  4. Cr

Questions & Step-by-Step Solutions

Which of the following elements has an incomplete d subshell?
Correct Answer: Chromium (Cr)
  • Step 1: Understand what a d subshell is. The d subshell can hold a maximum of 10 electrons.
  • Step 2: Know that an incomplete d subshell means that the d subshell does not have all 10 electrons.
  • Step 3: Look at the electronic configuration of the elements given in the question.
  • Step 4: Identify the electronic configuration of Chromium (Cr), which is [Ar] 4s1 3d5.
  • Step 5: Analyze the 3d part of the configuration. Since it has 5 electrons, it is not full (incomplete).
  • Step 6: Conclude that Chromium (Cr) has an incomplete d subshell.
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