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CAIE A-Level Chemistry AS 2.1.1 Unified Atomic Mass Unit Questions

Practise defining the unified atomic mass unit as one twelfth of the mass of a carbon-12 atom, the reference used for relative atomic masses.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Define the unified atomic mass unit as one twelfth of the mass of a carbon-12 atom.

CAIE A-Level Chemistry AS 2.1.1 Unified Atomic Mass Unit Questions question 1

[Maximum number: 1]

Copper is used in electrical equipment. It has a melting point of 1085∘C1085^{\circ} \mathrm{C}.

The relative isotopic masses and natural abundances of the two isotopes in a sample of copper are shown in Table 1.1.

Table 1.1

Table 1.1

Define the unified atomic mass unit.

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