Quantum Energy Levels Calculator

Calculate atomic energy levels, transition energies, photon wavelengths, and spectral series for hydrogen-like atoms.

Atomic Number (Z)

Initial Level (n)

Target Level

Energy at n

-13.6 eV

Transition Energy

10.2 eV

Photon Wavelength

121.57 nm

Ionization Energy13.6 eV

Orbital Radius0.529 A

Degeneracy (2n²)2

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Formula

Eₙ = -13.6 eV × Z² / n²

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