CAIE IGCSE Chemistry Elements Compounds and Mixtures

Practise defining and distinguishing elements, compounds and mixtures from particle diagrams, substance names and whether components are chemically bonded.

Exam points

define an element as atoms with one proton number that cannot be chemically broken down further
define a compound as two or more elements chemically bonded in a fixed substance
identify a mixture as substances not chemically combined, including air, brass or mixed particle diagrams

[Maximum number: 1]

A list of substances is shown.
> ammonia bauxite carbon dioxide carbon monoxide ethanol hematite oxygen sodium chloride sulfur dioxide

Answer the questions using the list of substances.
Each substance may be used once, more than once or not at all.
State which substance is:

an element ..... [1]

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2.1.1—Differences between elements question 1