Across
- 2. a test that tests for hydrogen. Named after the sound it makes.
- 3. a chemical reaction that occurs inside the leaves of plants.
- 5. this substance turns milky when mixed with carbon dioxide.
- 8. substances made up of only one type of atom.
Down
- 1. substances made up of two or more types of atoms joined in a molecule.
- 2. a type of reaction that is reversible, and where no new substances is created.
- 4. a type of reaction where something new and different is created, and cannot be reversed.
- 6. substances made up of two or more different types of elements and compounds.
- 7. a gaseous element that causes a glowing splint to light into a candle.