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What is the electron configuration of potassium (K)?

Practice Questions

Q1
What is the electron configuration of potassium (K)?
  1. 1s² 2s² 2p⁶ 3s¹
  2. 1s² 2s² 2p⁶ 3s²
  3. 1s² 2s² 2p⁶ 3s² 3p¹
  4. 1s² 2s² 2p⁶ 3s² 3p²

Questions & Step-by-Step Solutions

What is the electron configuration of potassium (K)?
  • Step 1: Identify the atomic number of potassium (K), which is 19. This means potassium has 19 electrons.
  • Step 2: Fill the electron shells according to the order of energy levels: 1s, 2s, 2p, 3s.
  • Step 3: Start filling the first shell (1s) with 2 electrons: 1s².
  • Step 4: Move to the second shell and fill the 2s subshell with 2 electrons: 2s².
  • Step 5: Fill the 2p subshell with 6 electrons: 2p⁶.
  • Step 6: Now, move to the third shell and fill the 3s subshell with 1 electron: 3s¹.
  • Step 7: Combine all the filled subshells to get the complete electron configuration: 1s² 2s² 2p⁶ 3s¹.
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