Which of the following electronic configurations correctly represents an element in period 3 of the…

Chemistry WAEC 2009

Which of the following electronic configurations correctly represents an element in period 3 of the periodic table?

  • 1s2 2s2 2p2
  • 1s2 2s2 2p6
  • 1s2 2s2 2p6 3s2 3p4 checkmark
  • 1s2 2s2 2p6 3s2 3p6 4s1

The correct answer is: C

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