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Which of the following elements has the electronic configuration [Ne]3s²? (2016)

Practice Questions

Q1
Which of the following elements has the electronic configuration [Ne]3s²? (2016)
  1. Sodium
  2. Magnesium
  3. Aluminum
  4. Silicon

Questions & Step-by-Step Solutions

Which of the following elements has the electronic configuration [Ne]3s²? (2016)
  • Step 1: Understand that the notation [Ne] represents the electron configuration of Neon, which has 10 electrons.
  • Step 2: The notation 3s² means there are 2 electrons in the 3s subshell.
  • Step 3: Combine the two parts: [Ne] means 10 electrons, and 3s² adds 2 more electrons, making a total of 12 electrons.
  • Step 4: Identify the element with 12 electrons. The element with 12 protons (and thus 12 electrons) is Magnesium (Mg).
  • Step 5: Conclude that Magnesium has the electronic configuration [Ne]3s².
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