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Structure of Atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
MCQ
What idea states that lower energy level orbitals will be filled with electrons before higher energy level orbitals?
  • A
    Pauli's exclusion principle.
  • B
    Octet rule.
  • C
    Aufbau principle.
  • D
    Hund's rule.
✓

Answer

  1. Aufbau principle.

Explanation:

Aufbau's rule/ principle states that the sub shell and orbitals of lower energy must be filled first before higher energy levels. The energy is proportional to (n + l) value.

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