45 chemistry puzzles based on sudoku to stimulate and challenge your students while consolidating their knowledge about key topics, with printable worksheets and answers

Boost your students’ learning and engagement using these printable ‘gridlock’ puzzles. Each sudoku-style puzzle addresses a topic relevant to 16–18 year olds studying chemistry, from the Born-Haber cycle to molecular geometry. Students actively review the relationships between key chemical ideas, data and examples, before applying their knowledge to complete a series of grid-based puzzles 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.

### Downloads

#### Alcohols (16-18)

**Handout**| PDF, Size 0.1 mb#### Amines

**Handout**| PDF, Size 0.1 mb#### Aqueous ions

**Handout**| PDF, Size 0.1 mb#### Atomic structure (16-18)

**Handout**| PDF, Size 0.1 mb#### Born-Haber cycle for magnesium chloride

**Handout**| PDF, Size 0.15 mb#### Born-Haber cycle for sodium chloride

**Handout**| PDF, Size 0.15 mb#### Chemical names with numeral prefixes

**Handout**| PDF, Size 0.1 mb#### Chromium oxidation states

**Handout**| PDF, Size 0.12 mb#### Complex ion shapes

**Handout**| PDF, Size 0.12 mb#### Concentration of solutions 1

**Handout**| PDF, Size 0.18 mb#### Concentration of solutions 2

**Handout**| PDF, Size 0.17 mb#### Electronegativity values

**Handout**| PDF, Size 0.12 mb#### Functional groups

**Handout**| PDF, Size 0.11 mb#### Gas laws 1

**Handout**| PDF, Size 0.13 mb#### Gas laws 2

**Handout**| PDF, Size 0.13 mb#### Halide ion tests

**Handout**| PDF, Size 0.13 mb#### Indicators

**Handout**| PDF, Size 0.12 mb#### Isomers of (E)-but-2-ene

**Handout**| PDF, Size 0.11 mb#### Mass concentration of solutions

**Handout**| PDF, Size 0.17 mb#### Moles equations (16-18)

**Handout**| PDF, Size 0.18 mb#### Multiples of units (16-18)

**Handout**| PDF, Size 0.19 mb#### Naming complexes (ligands)

**Handout**| PDF, Size 0.12 mb#### Naming complexes (metals)

**Handout**| PDF, Size 0.12 mb#### Naming esters

**Handout**| PDF, Size 0.1 mb#### Organic formulas 1

**Handout**| PDF, Size 0.12 mb#### Organic formulas 2

**Handout**| PDF, Size 0.11 mb#### Organic names (functional groups)

**Handout**| PDF, Size 0.1 mb#### Organic names (prefixes)

**Handout**| PDF, Size 0.1 mb#### Oxidation number rules

**Handout**| PDF, Size 0.14 mb#### pH values 1

**Handout**| PDF, Size 0.15 mb#### pH values 2

**Handout**| PDF, Size 0.15 mb#### pH and pOH values

**Handout**| PDF, Size 0.14 mb#### pH, H+ and pOH values

**Handout**| PDF, Size 0.14 mb#### Shapes of molecules 1: geometries of a central atom

**Handout**| PDF, Size 0.12 mb#### Shapes of molecules 2: distortion from the pure geometry

**Handout**| PDF, Size 0.11 mb#### Shapes of molecules 3: hybrid orbitals

**Handout**| PDF, Size 0.12 mb#### Significant figures

**Handout**| PDF, Size 92.08 kb#### Sodium halide reactions with sulfuric acid

**Handout**| PDF, Size 0.12 mb#### Some A-level reagents

**Handout**| PDF, Size 0.13 mb#### Subatomic particles (16-18)

**Handout**| PDF, Size 0.13 mb#### Subshells

**Handout**| PDF, Size 0.13 mb#### Symbols

**Handout**| PDF, Size 0.15 mb#### Vanadium

**Handout**| PDF, Size 0.1 mb#### Volume of gases

**Handout**| PDF, Size 0.11 mb#### Volumetric apparatus

**Handout**| PDF, Size 0.13 mb

### Additional information

These resources were originally part of the Gridlocks website, produced by the Royal Society of Chemistry with support from the Wolfson Foundation.

## Gridlocks: 101 printable chemistry puzzles

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- 4Currently reading
### Puzzles for 16-18 year olds: from aqueous ions to subshells

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