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.

### Downloads

#### Acids

**Handout**| PDF, Size 0.12 mb#### Alcohols (14-16)

**Handout**| PDF, Size 0.11 mb#### Alkalis

**Handout**| PDF, Size 0.12 mb#### Alkanes

**Handout**| PDF, Size 0.11 mb#### Allotropes of carbon

**Handout**| PDF, Size 0.17 mb#### Atomic structure

**Handout**| PDF, Size 0.1 mb#### The blast furnace

**Handout**| PDF, Size 0.1 mb#### Crude oil

**Handout**| PDF, Size 0.1 mb#### Esters from alcohols and acids

**Handout**| PDF, Size 0.12 mb#### Everyday chemicals (14-16)

**Handout**| PDF, Size 0.1 mb#### Flame test colours

**Handout**| PDF, Size 0.12 mb#### Forensic tests

**Handout**| PDF, Size 0.1 mb#### Gases in air

**Handout**| PDF, Size 0.1 mb#### Hydroxide precipitates

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

**Handout**| PDF, Size 0.11 mb#### Ionic formulas 2

**Handout**| PDF, Size 0.11 mb#### Iron and steel

**Handout**| PDF, Size 0.1 mb#### The limestone cycle

**Handout**| PDF, Size 0.12 mb#### Moles equations (14-16)

**Handout**| PDF, Size 0.18 mb#### Multiples of units (14-16)

**Handout**| PDF, Size 0.18 mb#### Noble gases

**Handout**| PDF, Size 0.12 mb#### Oxide types

**Handout**| PDF, Size 0.12 mb#### Pollutants in the air (14-16)

**Handout**| PDF, Size 0.11 mb#### State symbols

**Handout**| PDF, Size 0.1 mb#### Subatomic particles

**Handout**| PDF, Size 0.13 mb#### Tests for anions

**Handout**| PDF, Size 0.12 mb#### Types of bonding

**Handout**| PDF, Size 0.12 mb#### Units of volume

**Handout**| PDF, Size 0.12 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

- 1
- 2
- 3Currently reading
### Puzzles for 14-16 year olds: from atoms to units of volume

- 4

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