Cambridge IGCSE Combined Science practice

Paper 3 structured question: Atomic structure and the Periodic Table

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Paper

Marks

Topic

Atomic structure and the Periodic Table

Exam-style question

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Paper 3Theory (Core)2 marks

Isotopes and mass number

Description

Carbon has two isotopes: Carbon-12 and Carbon-14. Compare their mass numbers.

a
Compare the mass numbers of Carbon-12 and Carbon-14.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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Paper 3Theory (Core)1 marks

Description

An atom has 15 protons and 16 neutrons. Calculate its mass number.

a
Calculate the mass number of the atom.
Your answer
Aim for approximately 1 distinct marking point.
[1]