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CAIE A-Level Physics 11.1.12 Unified Atomic Mass Unit

Practise using the unified atomic mass unit u for nuclear or particle masses and converting or comparing values with kilograms.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • use the unified atomic mass unit u as a unit of nuclear or particle mass and convert or compare stated masses

11.1.12—The unified atomic mass unit (u) as a unit of mass question 1

[Maximum number: 1]

The discovery of a particle with an unusual charge was an important step in the development of the theory of quarks. The particle is a hadron with a mass of 2.19×10−27 kg2.19 \times 10^{-27} \mathrm{~kg} and a charge of +2 e, where e is the elementary charge.

Calculate the mass, in u, of the particle. Give your answer to three significant figures.
mass = u

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