A-Level
EDEXCEL
Chemistry
January 2026
17 Marks
QP-202601-Chemistry-U1 · Question 25
Question (excerpt):
Turn over 17 25 This question is about isotopes. (a) Magnesium exists as a mixture of three isotopes, 24Mg, 25Mg and 26Mg. (i) Complete the table to show the numbers of subatomic particles for …
Turn over 17 25 This question is about isotopes. (a) Magnesium exists as a mixture of three isotopes, 24Mg, 25Mg and 26Mg. (i) Complete the table to show the numbers of subatomic particles for …
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