physical science semester 1 project

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Across
  1. 1. bond between a metal and nonmetal
  2. 3. properties that can be observed without changing the composition of the substance
  3. 4. an equal sharing of electrons between two atoms
  4. 5. an unequal sharing of electrons between two atoms
  5. 6. occurs when the atoms of a substance are rearranged to produce something new
  6. 9. the substances that form in a chemical reaction
  7. 10. A chemical reaction form new products
  8. 11. a bond between a nonmetal and
  9. 13. Occurs when two or more element or compounds combines to form a single larger molocule
  10. 16. Matter changes form but not chemical idenity
  11. 18. the speed of chemical reactions
  12. 19. properties that can be observed by changing the composition of the substance
  13. 22. Written form of a chemical reaction
  14. 23. electrons on the outermost shell
Down
  1. 2. equal sharing of electrons between two atoms
  2. 7. all particals of matter exert forces of attraction on one another
  3. 8. The amount of energy required to pull a chemical equation apart
  4. 12. the substances that react in a chemical reaction
  5. 14. all particles of matter are constantly in motion
  6. 15. Chemical reaction that absorbs energy
  7. 17. Energy required to start a chemical reaction
  8. 20. Chemical reaction that releases energy
  9. 21. attraction between a metal cation and the shared electrons that surround it