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NEET2019ChemistryStructure of AtomActual

4 d ,   5 p ,   5 f and 6 p orbitals are arranged in the order of decreasing energy. The correct option is:

Options

  1. A5 f > 6 p > 5 p > 4 d
  2. B6 p > 5 f > 5 p > 4 d
  3. C6 p > 5 f > 4 d > 5 p
  4. D5 f > 6 p > 4 d > 5 p

Correct answer

A. 5 f > 6 p > 5 p > 4 d

Step-by-step solution

n + l values: 4 d = 4 + 2 = 6 5 p = 5 + 1 = 6 5 f = 5 + 3 = 8 6 p = 6 + 1 = 7 Sub-shell which has higher n + l value, has more energy. If n + l is same for two sub-shells, then the one having more n value has more energy. 5 f > 6 p > 5 p > 4 d

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