Electrons in atom

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Electron Configuration is the arranged in various orbitals around the nucleus and they are 3 rules

1. Aufbau Pinciple

2. Pauli exclusion principle

3. Hund's

Aufbau Principal electrons occupy the orbitals of lowest energy first. In this diagram, each box represents an atomic orbital.

PauliExclcsion Principle an atomic orbital may discribe at most two electrons. To occupy the same orbitaltwo electrons must have opposite spins; that is, the electron spins must be paired. Spin is a quantum mechanical property of electrons and may be thought s as clockwise or counterclockwise

Hund's rule lectrons occupy orbitals of the same energy in a way that makes the number of electrons with he same spin direction as large as possible.

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