Puzzles that balance.
120 clue-free chemistry crosswords where the answers are chemical equations. No word clues, no trivia — the equation is the clue. Every across and down entry is a complete, balanced chemical reaction, and entries cross where they share a token: a coefficient, an element symbol, a formula. Fill the blanks so every reaction balances at once.
How it works
Read each equation as your clue. Fill the empty boxes with the missing coefficients, formulas, and products, then let the crossings confirm your work — where two equations meet, the shared cell has to satisfy both. Balance the atoms, mind the charges, and let the intersections catch your mistakes. When a grid is complete, every reaction on the page is balanced.
Inside Volume 1
Who it's for
Built for grades 8–10 as homework practice, homeschool review, or classroom enrichment — and rigorous enough for any chemically curious solver. Rigorous enough for the classroom, quiet enough for a coffee break.
Check your work
Complete, worked solutions are available in the companion Chemistry Crossword Puzzles, Vol. 1: Answer Key (sold separately).
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