BRAINCAKEElectron Energy Levels
The electrons in an atom can only have certain definite (discrete) energies. These allowed energies are called energy levels. An electron cannot have an energy between two levels.
The lowest energy level is the ground state. This is the most stable state, and it is where the electrons normally are. Higher levels are called excited states.
Energy levels are usually given in electronvolts (eV). One electronvolt is the energy transferred when an electron moves through a potential difference of 1 V:
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More in Quantum Physics
- Stopping Potential
- Electron Diffraction
- DeBroglie Wavelength
- Electron Microscopes
- Excitation and De-excitation
- Line Spectra
- Exam Question 1
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All 21 lessons in Quantum Physics · All Edexcel AS-level Physics topics