Chemistry puzzles

Science and chemistry-themed puzzles, including wordoku, quick and cryptic crosswords. Test your chemistry knowledge and puzzle-solving skills

Win with GPE Scientific

These cryptic crosswords each contain two special letters. Complete the crosswords and make a note of the letters – if you can work out the chemistry-related term they make, you could be in with a chance of winning one of ten prizes valued at £50 each.

Email your solution to chemistryworld@rsc.org by 24 July 2026 to be in with a chance of winning!

Cryptic crossword grid 139

Cryptic chemistry crossword #139

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To solve this cryptic chemistry crossword, you will need to ’catch the inventor (4)’

Cryptic crossword grid 138

Cryptic chemistry crossword #138

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Solve this cryptic crossword and you’ll be the ‘Surprising envy of adorable chemist (5, 3, 6)’

Cryptic crossword grid 137

Cryptic chemistry crossword #137

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Can you find the ‘Metal bolt cast with a little carbon (6)’ in this cryptic crossword puzzle

Cryptic crossword grid 136

Cryptic chemistry crossword #136

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Find out if you have a ‘Latent sort of ability (6)’ for solving cryptic crosswords

Wordoku grid 146

Chemistry wordoku #148

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Find the Cuba-born American chemist particularly associated with fulluerene research in the solution to this sudoku-inspired puzzle

Wordoku grid 147

Chemistry wordoku #147

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Complete this sudoku-inspired puzzle to find the holder of an official chemistry role in the UK 

Wordoku grid 146

Chemistry wordoku #146

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Find the coronavirus expert in the solution to this sudoku-inspired puzzle

Quick crossword grid 104

Quick chemistry crossword #104

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Knowing your electrical units will help with this quick chemistry crossword

Quick crossword grid 103

Quick chemistry crossword #103

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Egg experts will find this quick chemistry crossword eggstra eggciting

Quick crossword grid 102

Quick chemistry crossword #102

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Galvanise yourself to solve this quick chemistry crossword

Quick crossword grid 101

Quick chemistry crossword #101

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Indian and Danish physicists meet British astronomers and evolutionary biologists in this quick chemistry crossword 

Jumbo 2025 quick crossword grid

Jumbo quick crossword 2025

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An extra large edition of our quick chemistry crossword