MCQ
What idea states that lower energy level orbitals will be filled with electrons before higher energy level orbitals?
- APauli's exclusion principle.
- BOctet rule.
- ✓Aufbau principle.
- DHund's rule.
✓
Answer
Correct option: C.
Aufbau principle.
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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