Explore Chemistry
Explore elements, atoms, compounds, reactions and the chemistry encountered in everyday life. Build from the periodic table to acids, bases and laboratory ideas.
People, places and ideas to know
Hydrogen has atomic number 1, oxygen is essential to respiration and water has the formula H₂O. Dmitri Mendeleev is strongly associated with the development of the periodic table. Learn common symbols such as Na for sodium, Fe for iron and Au for gold.
Topics in this quiz
- Elements and symbols
- Atoms and molecules
- Reactions
- Acids and bases
How the quiz works
Each round contains 15 timed multiple-choice questions. Score at least 10 out of 15 to unlock the next round. Later rounds become more challenging and award more points, while the fifth and final round tests whether you can beat the timer.
Learn while you play
Answers are followed by immediate feedback, helping you recognise what you know and what to revisit. Registered players can save their progress, improve their scores and compete on the World Quiz leaderboard.