Chemistry Bonus

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Across
  1. 2. writing numbers as a product by stating to the power of
  2. 4. absorbs heat
  3. 6. state of being exact
  4. 8. ion capable of accepting a proton
  5. 10. made up of two or more separate elements
  6. 11. converting units of measure into another
  7. 13. basic unit of a chemical element
  8. 14. a chemical bond formed when two atoms share electrons
  9. 17. state of being correct
  10. 18. relationship of substances reacting or forming a compound
  11. 20. form in which something exist in
Down
  1. 1. releases heat
  2. 3. representation of a chemical reaction
  3. 5. table of chemical elements
  4. 7. electrons in the outermost shell of an atom
  5. 9. chemical bond formed when an element gives up one or more electrons to another
  6. 12. amount of substance containing the same number of chemical units
  7. 15. heat involved during a chemical reaction
  8. 16. hydrogen capable of giving a proton
  9. 19. digits that mean something in a number