O-LevelPhysicsNuclear Physics5054/11 · Oct/Nov 2020 · Q401 Mark

An isotope P is radioactive and has a half-life of 7.0 years. A sample initially contains 0.016 kg of P. After how long will the sample contain 0.0020 kg of P?

A7.0 years

B14 years

C21 years

D28 years

✓ Correct answer

C: 21 years

Oracle Prep sorts past-paper questions by topic, so you can drill Nuclear Physics and see which topics are most likely to come up next.

Topic: Nuclear Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2020 Paper 1 Variant 1, question 40.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

Where is energy released by the fusion of hydrogen nuclei to form helium?

Which row gives the range and electrical charge of an alpha-particle?

¹⁴₆C represents a nuclide of the element carbon and ¹⁴₇N a nuclide of nitrogen. How does a neutral atom of ¹⁴₇N diffe…

A satellite is orbiting the Earth. What is the direction of the force on the satellite causing this circular motion?

Four objects are situated in places with different gravitational field strengths. Which object has the greatest weight?

A beam of length 40 cm is pivoted at one end. The weight of the beam is 4.0N and acts at a point 20 cm from the pivot…