AS Chemistry - Ionisation Energy

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Define First Ionisation Energy
The energy needed to remove one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions.
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Define successive ionisation energy
The energy required to remove each electron in turn.
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Where is the first electron removed from, explain your answer.
The outer shell as this is the highest energy electron.
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Explain why ionisation is always an endothermic process.
Energy is required to overcome attraction between positive nucleus and the negative outer electron which is being removed.
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As atomic radius increases, ionisation energy..
decreases
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As electron shielding increases, ionisation energy..
decreases
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As nuclear charge increases, ionisation energy..
increases
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Down a group, first ionisation energy..
decreases
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Across a period, ionisation energy..
increases
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State and explain the general trend in successive ionisation energies
 As each electron is removed ionisation energy increases because  the proton: electron ratio increases, this tends to increase ionisation energy  the remaining electrons are closer to the nucleus, this tends to increase ionisation energy 
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Card 2

Front

Define successive ionisation energy

Back

The energy required to remove each electron in turn.

Card 3

Front

Where is the first electron removed from, explain your answer.

Back

Preview of the front of card 3

Card 4

Front

Explain why ionisation is always an endothermic process.

Back

Preview of the front of card 4

Card 5

Front

As atomic radius increases, ionisation energy..

Back

Preview of the front of card 5
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