BRAINCAKESuccessive Ionisation Energies
Successive ionisation energies increase because the remaining electrons are pulled closer to the nucleus after each electron is lost and the nuclear attraction on the remaining electrons increases.
The second ionisation energy is the energy required to remove one electron from each ion in one mole of gaseous 1+ ions of an element to form one mole of gaseous 2+ ions.
Mg+(g) → Mg2+(g) + e-
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Key terms in this lesson
- Mole
- The amount of substance that contains as many particles as there are atoms in exactly 12g of carbon-12.
- Group
- A vertical column of the periodic table, containing elements with the same number of outer-shell electrons.
- Period
- A horizontal row of the periodic table, containing elements with the same number of electron shells.
More in Periodicity
- Reactivity
- Hydrogen and Helium
- Periodicity and Period 3 Elements
- Trends in Melting and Boiling Points
- Atomic Radii
- First Ionisation Energy
- Group 2 and 3
- Group 5 and 6
All 14 lessons in Periodicity · All AQA AS-level Chemistry topics