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Edexcel A Level Chemistry June 2026 Paper 1 Paper 2 and
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---71May 20262025/2026A+
- Edexcel A Level Chemistry June 2026 Paper 1, Paper 2 and 
Paper 3 Markschemes Only [VERIFIED] Guaranteed Pass 
 
Define first ionisation energy - answer - Energy required to remove one electron from 
each atom in a mole of gaseous atoms producing one mole of 1+ gaseous ions 
 
 
 
Define second ionisation energy - answer - Energy required to remove an electron (the 
second electron) from each atom in a mole of gaseous 1+ ions producing one mole of 2+ 
gaseous ions 
 
 
 
how doe...
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