Across
- 4. materials which have a conductivity between conductors
- 6. a substance that takes part in and undergoes change during a reaction.
- 8. is a substance that is formed as the result of a chemical
- 9. any of the four substances air, water, fire, and earth formerly believed to compose the physical universe
Down
- 1. fixed distances from the nucleus of an atom where electrons may be found
- 2. weighted average of all of the isotopes of that element
- 3. a multiplier or factor that measures some property.
- 5. everything around you
- 7. natural materials that do not produce heat
- 8. a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.