The magnitude of the charge on a β\betaβ-particle is 1.6 × 10-19 C.
State the proton number and nucleon number of a helium-3 nucleus.
proton number = _________
nucleon number = _________
Determine the magnitude of the charge of a helium-3 nucleus.
charge = _________
A nucleus of thorium-234 consists of 90 protons and 144 neutrons. Thorium-234 is radioactive and decays by β\betaβ-emission to an isotope of protactinium. The symbol for thorium is Th\text{Th}Th and the symbol for protactinium is Pa\text{Pa}Pa.
Write down the nuclide equation for this decay.
The half-life of thorium-234 is 24 days24\text{ days}24 days. A sample contains 4.8 × 10-9 g of thorium-234.
Calculate the mass of thorium-234 remaining in the sample after 96 days96\text{ days}96 days.
120 exam-style questions on CIE IGCSE Physics 5.2.3a Radioactive decay. Each one has a worked solution and a mark scheme showing where the marks go.