HKDSE (Hong Kong) · Physics
Radioactivity
8 practice questions, each with the answer and an explanation.
Practise Radioactivity now
Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 8 questions
- A radioactive sample has a half-life of 10 days. Its mass of the radioactive nuclide is 160 g. How much remains after 30 days?
- A radioactive sample has a half-life of 5 days. Its mass of the radioactive nuclide is 320 g. How much remains after 15 days?
- A radioactive sample has a half-life of 10 days. Its mass of the radioactive nuclide is 240 g. How much remains after 30 days?
- A radioactive sample has a half-life of 5 days. Its mass of the radioactive nuclide is 640 g. How much remains after 15 days?
- A radioactive sample has a half-life of 10 days. Its mass of the radioactive nuclide is 320 g. How much remains after 30 days?
- Which radiation is the most ionising?
- A nucleus emits an alpha particle. How do its mass number and atomic number change?
- In beta-minus decay, a neutron in the nucleus changes into