= Quantum number
{wiki=Quantum_number}
Quantum numbers are a set of numerical values that describe the unique quantum state of an electron in an atom. They provide important information about the energy, shape, and orientation of atomic orbitals, as well as the spin of the electrons. There are four principal quantum numbers used to describe electrons in atoms: 1. **Principal Quantum Number (n)**: This quantum number indicates the energy level and size of the orbital. It can take positive integer values (1, 2, 3, ...).
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