Ionisation Energy
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7 Terms
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When can an atom or molecule be lonised?
When electrons have been removed from an atom or molecule
2
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What's the 1st ionisation energy?
The energy needed to overcome 1 mole of electrons from I mole of gaseous atoms
3
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How is it an endothermic process?
You have to put energy in to ionise an atom or molecule
4
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Write the equation for the 1st ionisation of oxygen:
O (g) → O+ (g) + e-
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Why must you use the gas state symbol?
Ionisation energies are measured for gaseous atoms
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What must you always refer?
1 mole of atoms not a single atom
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What makes it easier to form an ion?
Low ionisation energy
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