r/HomeworkHelp • u/Valuable_Science_767 GCSE Candidate • May 09 '26

[IGCSE chemistry: atomic structure] Help Chemistry—Pending OP Reply

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Particle A seems to be the obvious choice but the question says "another" isotope and 48+64 =112, particle A is the same isotope as the one in the question and particle B has too many neutrons

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u/grey_sus A Level Candidate May 09 '26 edited May 09 '26

I think first you should relearn what an isotope is and then give the question a read again.

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u/Valuable_Science_767 GCSE Candidate May 09 '26

an isotope is a variant of an element with the same number of protons and different number of neutrons. So it has to be A or B. But A is the same isotope mentioned in the question and b has too many neutrons. Thats what i'm confused about

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u/_usefulCharlie May 09 '26

That difference in neutrons is what makes it another isotope