Across
- 2. A red brown metal
- 5. The symbol on the periodic table is, Ca.
- 6. The 3rd most prevalent gas on earth.
- 7. Atomic number = 1
- 9. Has 2 protons.
Down
- 1. 22.98977
- 3. Is black and may contain diamonds.
- 4. Has a atomic number of 22.
- 7. Has 2 hydrogen and 2 oxygen.
- 8. Most cans consist of it