Across
- 1. a number placed in front of an element symbol or chemical formula in an equation
- 3. stored energy (two words)
- 4. the amount of matter in an object
- 6. occurs when one substance reacts to another
- 10. the mass per unit volume of a substance
- 12. a charachteristic of matter that can be observed (two words)
- 15. could be hot or cold
- 18. more energy is released when the products form than is required (two words)
- 19. energy due to motion (two words)
- 20. occurs when substances react with oxidizing agents changing it to a new substance
- 22. the amount of force per unit area applied to an objects surface
- 23. the amount of space an item takes up
- 25. more energy is required to break the bonds of the reactants (two words)
Down
- 2. the ability to burn
- 5. matter with a composition that is always the same
- 7. from a liquid to a gas
- 8. two or more atoms that are held together by convalent bonds
- 9. when atoms form new bonds (two words)
- 11. a starting substance in a chemical reaction
- 13. the energy released when atoms form bonds (three words)
- 14. the result of the motion of all the particles heating the substance up (two words)
- 16. a substance produced by a chemical reaction
- 17. a substance containing one or more different elements chemically bonded together
- 21. smallest thing in the universe
- 24. consists of only one type of atom