JAMB - Chemistry (2024 - No. 86)
The electronic configuration of an atom of Nitrogen is 1s\(^2\) 2s\(^2\) 2p\(^1_x\) 2p\(^1_y\) 2p\(^1_z\) because the atom is
in an excited state
undergoing energy changes
unstable and ready to combine with another
simply obeying rules governing electron configuration
Explanation
The rules governing electron configuration are the Aufbau principle, Pauli's exclusion principle, and Hund's rule:
- Aufbau principle: Electrons fill the lowest energy orbitals first.
- Pauli's exclusion principle: No two electrons can have the same spin in one orbital. Each orbital can hold a maximum of two electrons with opposite spins.
- Hund's rule: Electrons fill empty orbitals singly before pairing up in the same sub-levels.
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