Across
- 3. Smallest possible unit into which matter can be divided, while still maintaining its properties
- 4. The smallest particle in a chemical element or compound that has the chemical properties of that element or compound.
- 6. negatively charged particle
- 9. The mass of a given atom or molecule. Number of protons and neutrons added together.
- 10. A mixture that does not appear to be the same throughout.
- 11. a particle with no charge
Down
- 1. A mixture that appears to be the same throughout.
- 2. number The number of protons in the nucleus of an atom.
- 5. Simplest form of pure substance.They cannot be broken into anything else by physical or chemical means.
- 7. Two or more substances that are not chemically combined with each other and can be separated by physical means. The substances in the mixture retain their individual properties.
- 8. positively charged particle