Across
- 4. table, list of elements
- 6. Negative charge
- 8. atom making 4 elements
- 9. weight/mass, weight of all elements
- 10. a positive charge
Down
- 1. substance that is not metal
- 2. natural gas
- 3. number, number of proton in the nucleates of an atom
- 5. hard substance/element
- 7. A negative charge
- 9. Basic unity of a chemical element