Exam (elaborations)
A-level: AS Chemistry Unit 2 Exam Questions and Answers Merged for New update
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Explain why the first ionisation energy of barium is less than the first ionisation energy of calcium - Ans .-more (electron) shells / (outer) electrons further from the nucleus / larger atoms / more shielding -so weaker attraction of nucleus/protons for (outer) electrons Magnesium reacts read...
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