Uploaded September 2020 | Updated September 2026, 2 weeks ago

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This short course introduces students to chemical formulae. Designed for complete beginners, it explains how to read and write chemical formulae.

Each section contains a 2-3 min explanation and is followed by a set of appropriate practice questions. Answers to these are provided.

Use the contents below to skip to the relevant section.

Contents

How to read formulae (0:21)
Practice questions (3:19)
Formulae involving prefixes (3:39)
Practice questions (5:48)
Understanding charges (6:08)
Practice questions (11:09)
Working out simple formulae (11:29)
Practice questions (17:42)
Working out formulae involving transition metals (18:02)
Practice questions (21:57)