Across
- 2. symbol for this element is Ca
- 5. symbol for this element is Hg
- 7. "uncuttable"
- 8. the smallest atom and explosive
- 9. symbol for this element is Cl
- 11. indicates the number of atoms
- 12. Most elements are this
Down
- 1. 2 or more atoms
- 3. indicates the number of molecules
- 4. chart that organizes all the elements
- 6. 2 or more different atoms
- 8. Symbol for this element is He
- 10. gases in the far right column of the Periodic Table
- 13. the number of elements that are liquid (room temp.)