Across
- 3. can be in between metals and non-metals
- 4. made up of one type of matter
- 6. workplace hazardous materials information system
- 8. when a new substance is formed and non-reversible
- 10. the mass of all protons and neutrons in an atom
- 11. the center of an atom
- 16. when non-metal combine
- 19. can eat away or corrode
- 20. when a solid changes to a gas
- 21. the mixture of magic and chemistry
- 24. contaminated material that is a threat to humans and health
- 25. electrically charged atoms
Down
- 1. chemical reaction that absorbs heat energy
- 2. change in appearance or state
- 5. mixture in which the different substances are visible
- 7. mixture of two or more pure substances that look like one substance
- 9. chemical reaction that releases heat energy
- 12. pure substance that cannot broken down any further
- 13. the number of protons in the nucleus of an atom
- 14. ability to conduct electricity or heat
- 15. a compound of a metal and non-metal
- 17. shiniest of a substances,
- 18. substances in a reaction
- 22. when a gas changes to a solid
- 23. the horizontal rows on the periodic table