MATSEC AM Chemistry Practice Questions - Malta Advanced Matriculation (AM) Chemistry - AM 06 (2026) Exam

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A sample of a radioactive isotope has a mass of 80.0 g. After three half-lives, what mass of the original isotope remains?

40.0 g 20.0 g 10.0 g 5.0 g

Correct Answer:

10.0 g

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