Across
- 1. non-metals are found on this side of the periodic table
- 4. examples include neon, argon and helium
- 6. negative subatomic particle
- 8. a change that cannot be easily undone
- 11. where protons and neutrons are found
- 13. metalloids are found near this on the periodic table
- 15. an element with the symbol Hg
- 18. most reactive non-metals
- 20. have characteristics of metals and non-metals
Down
- 2. a column on the periodic table
- 3. most reactive metals
- 5. tells you the number of protons and electrons
- 7. a row on the periodic table
- 9. an element with the symbol Pb
- 10. subatomic particle with no charge
- 12. where electrons can be found
- 14. positive subatomic particle
- 16. change a change in state of matter or size
- 17. metals are found on this side of the periodic table
- 19. tells you the total number of protons and neutrons