Across
- 2. He on the periodic table
- 3. NA on the periodic table
- 4. cl on the periodic table
- 5. C on the periodic table
- 7. S on the periodic table
Down
- 1. p on the periodic table
- 2. H on the periodic table
- 5. CA on the periodic table
- 6. B on the periodic table
- 7. AG on the periodic table