Across
- 5. Second row from the left of the periodic table
- 7. Toxic gas at room temp, found in table salt
- 9. OH-, very strong base
- 10. Low pH
- 11. 6th element, backbone of life
- 12. Positively charged subatomic particle
- 14. Type of compound with 2 elements
- 15. Solid falls out of solution in a reaction
- 17. Elements 57-71, separate from the table
- 19. Ion with more than one element
Down
- 1. Elements touching the "stair-step"
- 2. Hg, a very toxic element
- 3. Used to detect pH
- 4. Lightest of the most reactive elements
- 6. Horizontal row on the periodic table
- 7. Changing the substance's identity
- 8. Negatively charged subatomic particle
- 13. Center of the atom
- 16. Vertical column on the periodic table
- 18. Common element, found in table salt