Across
- 3. about the same mass of a proton
- 5. physical substance
- 6. a central and most important part of a element
- 9. mass cannot be created or destroyed
- 10. The ability to be stretched into a thin wire
Down
- 1. capable of being shaped
- 2. something manufactured or refined to scale
- 4. a concrete large body of matter
- 7. a participial with a negative charge
- 8. basic unit of a chemical element