Across
- 3. basic chemical unit
- 5. the vertical elements on the table
- 6. easy to break
- 7. between the metals and non-metals
- 8. mass all of the protons, neutrons, and electrons added up
- 10. inner core of the electron cloud
Down
- 1. right of the scientific equation
- 2. the letter(s) of the element
- 4. left of the scientific equation
- 9. the horizontal group along the table