Across
- 6. A shortened letter code used to represent an element
- 7. Describes a mixture with visible parts that are not evenly mixed
- 11. A type of material with its own composition and properties
- 12. A small lower number showing how many atoms of an element are present
- 13. To push objects with the same charge away from each other
- 14. A negatively charged particle found outside the nucleus
- 15. A pure substance made from only one type of atom
Down
- 1. Two or more substances together that are not chemically joined
- 2. A particle with no charge found inside the nucleus
- 3. Particles counted to find an element's atomic number
- 4. The type of charge carried by a proton
- 5. The total number of protons and neutrons inside an atom (2 words)
- 8. A very small piece of matter
- 9. Particles found by subtracting atomic number from mass number
- 10. An electrical property that can be positive negative or neutral