Chemistry Vocabulary

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Across
  1. 3. figures all the digits that can be known precisely in a measurement
  2. 5. A mixture that is completely uniform in its composition
  3. 7. matter that has a definite shape and volume
  4. 9. The ratio of the mass of an object to it volume
  5. 10. the amount of matter in an object
  6. 11. negative and a negative or positive and a positive charge
  7. 14. a homogeneous mixture
  8. 16. a pair of valence electrons that is not involved in bonding
  9. 17. a negatively charged subatomic particle
  10. 18. a starting substance in a chemical reaction
  11. 19. A reaction that has to do with fire
  12. 20. atoms of the same element that have the same atomic number
Down
  1. 1. positive and negative charges
  2. 2. a chemical equation in which mass is converted
  3. 4. a mixture that is not uniform in composition
  4. 6. A substance that can not be changed into something simpler
  5. 8. the smallest particle of an element
  6. 12. the space occupied by a sample of matter
  7. 13. an arrangement of elements into rows and columbs
  8. 15. anything that takes up space and has mass