Physics 0625 · IGCSE · Radioactivity

Radioactivity — practice question

Americium-241 is a radioactive nuclide, and a nucleus of americium-241 is written in nuclide notation as $^{241}_{95}\text{Am}$.
(a)[2]

protons in a single nucleus of americium-241, and neutrons in a single nucleus of americium-241.

(b)[3]

Calculate the mass of americium-241 still present in the source after $860$ years.

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