Ionisation Energy: Trends & Evidence (AQA A-Level Chemistry): Flashcards
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Effect of greater atomic radius on ionisation energy
Effect of greater atomic radius on ionisation energy
Less energy required to ionise
Atomic radius trend across a period
Atomic radius trend across a period
Decreases
Effect of increased nuclear charge on ionisation energy
Effect of increased nuclear charge on ionisation energy
Higher ionisation energy
Effect of shielding by inner electrons
Effect of shielding by inner electrons
Reduces energy required to remove outer electrons
First ionisation energy trend down a group
First ionisation energy trend down a group
Decreases
First ionisation energy trend across a period
First ionisation energy trend across a period
Increases
Why Group 3 elements show drop in ionisation energy
Why Group 3 elements show drop in ionisation energy
Electron enters higher-energy p-orbital, more shielded
Why Group 6 elements show drop in ionisation energy
Why Group 6 elements show drop in ionisation energy
Electron pairing in p-orbital causes repulsion
Why Al has lower ionisation energy than Mg
Why Al has lower ionisation energy than Mg
Electron removed from 3p orbital, not 3s
Large jumps in successive ionisation energies indicate
Large jumps in successive ionisation energies indicate
Electron removed from lower energy level closer to nucleus