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Which of the orbitals 4s, 4p, 4d and 4f has the lowest energy?

Chemistry
WAEC 1999
Which of the orbitals 4s, 4p, 4d and 4f has the lowest energy?
  • A. 4f
  • B. 4p
  • C. 4d
  • D. 4s
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Correct Answer: Option D
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