◈ Oracle PrepSign Up Free
O-LevelPhysicsNuclear Physics5054/11 · May/June 2018 · Q401 Mark

A radioactive nucleus is represented as ²³⁰₉₂U. Which row represents another isotope of the same element?

Anumber of protons in nucleus: 90, number of neutrons in nucleus: 140
Bnumber of protons in nucleus: 91, number of neutrons in nucleus: 138
Cnumber of protons in nucleus: 92, number of neutrons in nucleus: 139
Dnumber of protons in nucleus: 93, number of neutrons in nucleus: 136

✓ Correct answer

C: number of protons in nucleus: 92, number of neutrons in nucleus: 139

Practise more questions on this topic

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.

Sign up free →

About this question

Topic
Nuclear Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source
O-Level Physics, May/June 2018 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

Related Physics questions

Nuclear PhysicsMay/June 20121m

The radioactive isotope radium-226 may be shown as ⁸⁸²²⁶Ra. How many protons does an atom of radium contain?

Nuclear PhysicsMay/June 20121m

When dealing with radioactive materials there are possible dangers. Which statement is correct?

Nuclear PhysicsMay/June 20121m

An isotope X is radioactive and has a half-life of 4 years. A sample initially contains 8000 atoms of X. After how ma…

LightMay/June 20121m

In a short-sighted eye, light from distant objects is not focused on the retina. Where is this light focused and what…

WavesMay/June 20121m

Below are four statements about the uses of electromagnetic radiation. Gamma rays are used in medical treatment. Infr…

MagnetismMay/June 20121m

Two straight electrical conductors are parallel to one another. Each carries a current, one into the plane of the pap…

← Browse all past-paper questions

© 2026 Oracle Prep