Across
- 2. Indicates the number of energy levels
- 3. The number of non metal elements on the periodic table of elements
- 4. Used in blimps, airships, and balloons
- 6. Group 7A on the periodic table
- 8. Can be found in quartz crystal, sand, and glass
- 9. Most abundant metal in earth’s crust
- 10. _______ number indicates the valance electrons
Down
- 1. The designer of the periodic table of elements
- 5. Found widely in nature- rocks, coral reefs
- 7. least reactive of all the alkali metals