Mass-energy equivalence, binding energy, fission, fusion, radioactive decay.
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Q1 · Nuclei · EASY
A radioactive substance has a half-life of 30 minutes. What fraction of the initial sample will remain undecayed after 90 minutes?
Q2 · Nuclei · HARD
If the radius of nucleus ₁₃Al²⁷ is R₁ and the radius of nucleus ₅₂Te¹²⁵ is R₂, then the ratio R₂/R₁ is approximately (Given: R₀ = 1.2 fm)