02. Ionisation energy trends
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What happens to ionisation energy as you go across periods? Why?
Ionisation energy increases -> more protons, same amount of shielding
2
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What happens to ionisation energy as you go down groups? Why?
Ionisation energy decreases -> greater shielding of nucleus
3
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What happens to ionisation energy between He and Li?
Decreases because Li has an extra energy level
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What happens to ionisation energy between N and O?
Decreases because O has paired electrons in P orbitals, nitrogen has half filled P orbital
5
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What happens to ionisation energy between Be and B?
Decreases because B has a 2p orbital -> further from nucleus
Note 
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