Across
- 3. Change of one or more substances into other substances
- 5. A change in matter in which the substances that make up the matter change into other substances with different chemical and physical properties
- 6. A starting substance in a chemical reaction
- 8. A lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds
- 11. A number placed in front of an element symbol or chemical formula in an equation
- 12. Changes affecting the form of a chemical substance, but not its chemical composition
Down
- 1. Accompanied by the release of heat
- 2. A group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound
- 4. Accompanied by or requiring the absorption of heat
- 5. A chemical bond that involves the sharing of electron pairs between atoms
- 7. An atom or molecule with a net electric charge due to the loss or gain of one or more electrons
- 9. A substance produced by a chemical reaction
- 10. A type of chemical bonding that involves the electrostatic attraction between oppositely charged ions