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The ways in which electrons are the arrangement in various orbitals the nuclear of atoms.

Three rules the aufbau principle, the Pauli exclusion principle, and Hunds rule-tell you how to find atoms.

Electrons occupied the first energy level.

Each little square represents one orbital.

According to the Pauli exclusion principle, an atomic orbitalmay, describe at the most energy level.

To occupy the same orbitaltwo electrons must have opposite spins; that is, is the electrons.

According to Hunds rule, electrons occupy orbitals of the same energyin a way that makes the number of electrons with the same spin direction as large as possible.