MCQ
The atomic orbitals are progressively filled in order of increasing energy. This principle is called as
  • A
    Hund’s rule
  • Aufbau principle
  • C
    Exclusion principle
  • D
    de-Broglie rule

Answer

Correct option: B.
Aufbau principle
b
The aufbau principle, also called the aufbau rule, states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels.

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