Ionisation Energy

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Define ionisation energy
Energy required to remove 1 electron from each atom in 1 mole of gaseous atoms to form 1 mole of gaseous 1+ ions.
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3 Factors influencing ionisation energy
1) CHARGE OF NUCLEUS 2) DISTANCE FROM NUCLEUS 3) SHIELDING
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1) Charge of Nucleus - Explain
More p in nucleus, higher electrostatic force between e- and nucleus, meaning higher ionisation energy.
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2) Distance from nucleus- Explain
Farther away, less attraction felt by e- to nucleus, meaning lower ionisation energy
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3) Shielding - Explain
More inner shell e- will block the attraction force from the nucleus to the outermost electrons. More shielding, less attraction, therefore lower ionisation energy.
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How do ionisation energies show periodicity?
Period number increases, shells increases, making distance from nucleus and shielding increase, resulting in lower ionisation energy.
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Card 2

Front

3 Factors influencing ionisation energy

Back

1) CHARGE OF NUCLEUS 2) DISTANCE FROM NUCLEUS 3) SHIELDING

Card 3

Front

1) Charge of Nucleus - Explain

Back

Preview of the front of card 3

Card 4

Front

2) Distance from nucleus- Explain

Back

Preview of the front of card 4

Card 5

Front

3) Shielding - Explain

Back

Preview of the front of card 5
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