Across
- 3. positively charged particle in the nucleus of an atom
- 5. number of protons in the nucleus of one atom of an element
- 7. can be stretched into wire
- 8. shininess of a metal
- 9. ability to pound and roll into flat sheets
- 10. group 18 in periodic table, they are the most stable and nonreactive elements.
- 13. horizontal row of elements in the periodic table
- 14. Mass of Reactants= Mass of Products
- 17. chemical change that occurs when oxygen in the air reacts with a metal
- 19. substance that helps a chemical reaction proceed more quickly
- 21. at table in which elements are organized by their physical and chemical properties
- 23. a pure substance formed when two non metals combine
- 24. what everything is made of
- 25. workplace hazardous information material system
Down
- 1. invisible negatively charged particle that orbits the nucleus of and atom
- 2. chemical reaction that absorbs energy
- 4. Irreversible change
- 6. element that has both metallic and non metallic properties
- 11. chemical reaction that releases energy
- 12. the degree to which a specified material conducts electricity
- 15. metal the first column of the periodic table excluding hydrogen,that a really reactive in air and water
- 16. a pure substance formed when at least on metal and one non metal combine
- 18. catalyst involved in chemical reactions in living things
- 20. neutral particle in the nucleus of an atom
- 22. the mass of an element measured in amu