Chemistry Unit Review Crossword

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Across
  1. 5. Negative Charge
  2. 7. Positive Charge
  3. 9. Energy is released or give off
  4. 11. Absorb energy so feels colder
  5. 13. The ingredients before the reaction begins
  6. 16. The number atoms present BEFORE and AFTER a reaction takes place
  7. 17. Motion & Chemical Reactions
  8. 20. Made up of atoms
  9. 21. (on the P.T.) each numbered row is a...
  10. 22. A solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity
  11. 24. gaseous elements helium, neon, argon, krypton, xenon, and radon are...
  12. 25. Most important part of an atom
Down
  1. 1. The ingredients produced after reaction takes place
  2. 2. Subatomic particles, neutral charge
  3. 3. formed a shared pair, bond
  4. 4. (on the P.T.) a column of elements in the periodic table of the chemical elements.
  5. 6. Something that is composed of two or more separate element, a mixture
  6. 8. Mendeleev One of creators of periodic table
  7. 10. Really small, source of nuclear energy
  8. 12. They intermediate between those of metals and solid nonmetals. They are electrical semiconductors
  9. 14. What this is called if repeatedly goes around and around
  10. 15. An element or substance that is not a metal
  11. 18. mass The weight of an element
  12. 19. Element abbreviation
  13. 23. There are 118 of these