The electron configuration refers to the manner in which electrons are dispersed within an atom's electron shells. This configuration is key in comprehending the reactivity and chemical characteristics of the atom. The arrangement of electrons across energy levels, orbitals, and spins is guided by three primary principles: the Aufbau principle, the Pauli Exclusion principle, and Hund's rule. Typically, the electron configuration is expressed in formats such as 1s² 2s² 2p⁶.
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