Across
- 1. A substance made up of two or more different elements chemically bonded together.
- 4. A reaction that absorbs heat energy from its surroundings.
- 7. A number placed in front of a chemical formula to indicate the number of molecules.
- 8. A type of transformation where substances are altered into new ones with different properties.
- 10. A substance formed as the result of a chemical reaction.
- 12. A process where reactants are transformed into products through chemical changes.
Down
- 2. A transformation that affects the form of a substance but not its chemical identity.
- 3. A small number written below and to the right of a chemical symbol to show the number of atoms.
- 5. A starting substance that undergoes change in a chemical reaction.
- 6. A type of reaction that releases heat energy to the surroundings.
- 9. The basic unit of a chemical element.
- 11. The smallest unit of a compound that retains its chemical properties.