28 sudoku-inspired chemistry puzzles to stimulate and engage your students while reinforcing key ideas about a variety of topics, with printable worksheets and answers

Motivate and challenge your students using these printable ‘gridlock’ puzzles. Based on sudoku, each puzzle focuses on a specific topic suitable for 14–16 year olds, from allotropes of carbon to types of bonding. Students check their understanding of the connections between key chemical ideas and data, before applying their knowledge to complete a series of grids according to the rules provided.

Download the puzzles

Download and print the puzzles below. Each PDF features a series of gridlock puzzles based on a specific topic, with a printable student worksheet and answers.

How do the puzzles work?

To find out more about the rules and how you can use the puzzles in your teaching, see the Gridlocks overview.


Gridlocks: 101 printable chemistry puzzles