BRAINCAKEIonisation Energy across a Period
Ionisation energy depends on:
- the nuclear charge which depends on the number of protons
- the shielding, energy of the quantum shell and distance from nucleus
- the energy of the orbital
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Key terms in this lesson
- shielding
- The repulsion of outer shell electrons by electrons in filled inner shells, which reduces the nuclear attraction they feel.
- ionisation energy
- The energy needed to remove one electron from each atom in one mole of gaseous atoms, forming one mole of gaseous 1+ ions.
More in Atomic Structure
- Orbitals
- Electronic Configurations
- Predicting Electronic Configuration
- Energy Levels and Emission Spectra
- First Ionisation Energy
- Successive Ionisation Energies
- The Energy of an Electron
- Ionisation Energy Down a Group
All 19 lessons in Atomic Structure · All Edexcel AS-level Chemistry topics