Across
- 7. pure substances
- 10. combination of symbols that represent a compound
- 12. how much an atom weights(amu)
- 14. reversible
- 17. positively charged particals
- 19. non-reversible
- 22. neutral partical in the nucleus of an atom
- 23. lost or gain of electrons
- 24. vertical columns on the periodic table
Down
- 1. gas or liquid
- 2. absorbs heat
- 3. cloudy mixture, cannot be separated
- 4. metalic and non-metalic
- 5. group 17 on the periodic table
- 6. new substance
- 8. substances that react with another
- 9. releases heat
- 11. non-metal and non-metal
- 13. workplace hazardous materials info system
- 15. metal and non-metal
- 16. the number of protons
- 18. group 18 in the periodic table
- 19. combination of two or more elements
- 20. negative charge
- 21. horizontal rows on the periodic table