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