2024HSCMultiple choice

Q7

1 mark

Question

A pure sample of polonium-210 undergoes alpha emission to produce the stable isotope lead-206.

The half-life of polonium-210 is 138 days.

At the end of 276 days, what is the ratio of polonium-210 atoms to lead-206 atoms in the sample?
A. $1:4$
B. $1:3$
C. $1:2$
D. $1:1$

Try the question before revealing the answer.

Syllabus alignment

Module 8 · From the Universe to the Atom

Properties of the NucleusAnalyse alpha, beta and gamma decay and predict radioactive activity using half-life models.

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