Quantum numbers are also used to understand other characteristics of atoms, such as ionization energy and the atomic radius. Quantum numbers are important because they can be used to determine the electron configuration of an atom and the probable location of the atom's electrons. Each electron in an atom has a unique set of quantum numbers according to the Pauli Exclusion Principle, no two electrons can share the same combination of four quantum numbers. The combination of all quantum numbers of all electrons in an atom is described by a wave function that complies with the Schrödinger equation. A Closer Look at Shells, Subshells, and OrbitalsĪ total of four quantum numbers are used to describe completely the movement and trajectories of each electron within an atom.The Electron Spin Quantum Number (\(m_s\)).The Orbital Angular Momentum Quantum Number (\(l\)).
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