Posted inScience Simplified
The Pauli Exclusion Principle
Atoms are made up of a nucleus (protons and neutrons) surrounded by electrons. These electrons don’t just float randomly — they live in specific “zones” called orbitals, like seats in a theater.
Each seat (orbital) can hold two electrons, but only if they spin in opposite directions.
Once that seat is filled, no other electron can sit there — it has to find another orbital or energy level.
That’s Pauli’s rule.