Question

get it? state the three rules that define how electrons are arranged in atoms.
science notebook · electrons in atoms
71

Explanation:

The three rules for electron arrangement in atoms are the Aufbau principle (electrons fill lower - energy orbitals first), Pauli exclusion principle (no two electrons in an atom can have the same set of quantum numbers), and Hund's rule (electrons occupy degenerate orbitals singly before pairing).

Answer:

The three rules are:

• Aufbau principle: Electrons fill orbitals starting from the lowest energy level.
• Pauli exclusion principle: Each electron has a unique set of quantum numbers.
• Hund's rule: Electrons occupy degenerate orbitals singly first.