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What is the electronic configuration of a sodium ion (Na+)?

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Question: What is the electronic configuration of a sodium ion (Na+)?

Options:

  1. 1s2 2s2 2p6
  2. 1s2 2s2 2p6 3s1
  3. 1s2 2s2 2p5
  4. 1s2 2s2 2p6 3s2

Correct Answer: 1s2 2s2 2p6

Solution: 

Sodium ion (Na+) has lost one electron, resulting in the configuration 1s2 2s2 2p6.

What is the electronic configuration of a sodium ion (Na+)?

Practice Questions

Q1
What is the electronic configuration of a sodium ion (Na+)?
  1. 1s2 2s2 2p6
  2. 1s2 2s2 2p6 3s1
  3. 1s2 2s2 2p5
  4. 1s2 2s2 2p6 3s2

Questions & Step-by-Step Solutions

What is the electronic configuration of a sodium ion (Na+)?
Correct Answer: 1s2 2s2 2p6
  • Step 1: Understand that sodium (Na) has an atomic number of 11, which means it has 11 electrons when it is neutral.
  • Step 2: Write the electronic configuration for neutral sodium (Na), which is 1s2 2s2 2p6 3s1.
  • Step 3: Recognize that a sodium ion (Na+) is formed when sodium loses one electron.
  • Step 4: Remove one electron from the outermost shell (3s), which leaves us with 1s2 2s2 2p6.
  • Step 5: Conclude that the electronic configuration of a sodium ion (Na+) is 1s2 2s2 2p6.
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