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What is the principal quantum number of the outermost electron in potassium (K)?

Practice Questions

Q1
What is the principal quantum number of the outermost electron in potassium (K)?
  1. 3
  2. 4
  3. 2
  4. 1

Questions & Step-by-Step Solutions

What is the principal quantum number of the outermost electron in potassium (K)?
  • Step 1: Identify the element in question, which is potassium (K).
  • Step 2: Find the atomic number of potassium, which is 19.
  • Step 3: Determine the electronic configuration of potassium. It is [Ar] 4s1.
  • Step 4: Look at the outermost electron in the electronic configuration, which is in the 4s subshell.
  • Step 5: Identify the principal quantum number, which corresponds to the energy level of the outermost electron. In this case, it is 4.
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