Across
- 2. A number that indicates the number of atoms in the particle of a substance.
- 4. Atom, ion or molecule.
- 7. The smallest particle of a chemical element that can exist.
- 9. A process in which one or more substances, the reactants, are converted to one or more different substances, the products.
Down
- 1. A form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components without breaking chemical bonds. It is composed of one type of particle.
- 3. The starting materials in a chemical reaction.
- 5. It's a written representation, using numbers and symbols, of the process that occurs during a chemical reaction.
- 6. A substance that is formed as the result of a chemical reaction.
- 8. An expression that states the number and type of atoms present in a particle of a substance.