Across
- 4. How hot or cold something is
- 6. an arrangement of elements showing the repeating patterns of their properties.
- 9. the change of state from liquid to gas.
- 11. a reaction that releases energy, example: the body
- 15. 2,8,18,32.
- 17. a material that increases the rate of a reaction by lowering the activation energy.
- 21. a chemical reaction that break down compounds into simpler products.
- 22. the ratio of mass of a substance to it volume.
- 23. the basic particle from which all elements are made.
- 24. the attractions between oppositely charged ions.
- 25. a chemical reaction when two or more simple substances combine to form a new, more complex substance.
Down
- 1. a short way to show a chemical reaction using symbols.
- 2. a chemical reaction replaces another in a compound, or when 2 elements trade places.
- 3. A small particle that is neutral.
- 5. a state of matter that has no definite shape but has a definite volume.
- 7. the amount of matter in an object.
- 8. a chemical bond formed when two atoms share an electron.
- 10. a reaction that absorbs energy, example: ice
- 12. the temperature at which a substance changes from a solid to a liquid.
- 13. represents the amount of electrons in electron configuration.
- 14. small, positive particles found in the nucleus.
- 16. a state of matter that has a definite shape and volume.
- 18. a state of matter that has no definite shape or volume.
- 19. anything that has mass and takes up space.
- 20. small, negative particles that move around the nucleus.