Across
- 2. Ionized gas consisting of approx. equal numbers of positive charged ions and negative charged electrons
- 3. A number of people or things that are put together
- 6. Particle with a charge of negative electricity
- 8. Particle of about the same mass as protons
- 9. A solid material that is typically hard, shiny and durable
- 10. An element whose properties are intermediate between metals and non-metals
- 12. A substance made by mixing other substances together
- 13. Everything in the universe that has mass and volume is made of this
- 15. A thing that is composed of two or more elements
- 16. Number of protons in the nucleus of an atom
Down
- 1. Substance that cannot be chemically broken down
- 4. Table arrangement of chemical elements, ordered by atomic number
- 5. A group of atoms bonded together
- 7. Notation of one or two letters representing a chemical element
- 11. A substance that flows freely, having a consistency like water
- 14. Having 3- dimensions; a shape