A sample containing radium-226 was measured in 1925 to have an activity of 3.74 × 10^6 disintegratio — Kinetics Chemistry Question
Question
A sample containing radium-226 was measured in 1925 to have an activity of 3.74 × 10^6 disintegrations per second. The same sample, re-measured in 2025, has an activity of 3.58 × 10^6 disintegrations per second. What is the half-life of 226Ra?
A.
620 years
B.
1200 years
C.✓ Correct
1600 years
D.
2300 years
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