Classifying Matter

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Across
  1. 1. A black solid
  2. 3. chemical formula of water
  3. 4. salt ____ in water
  4. 6. a compound often has ____ properties from the elements that compose it
  5. 7. the combination of symbols and numbers that represent a compound
  6. 8. Everything that takes up space
  7. 10. has a diameter a million times greater than an atom
  8. 11. has a neutral charge
  9. 13. a heterogeneous mixture is ____ mixed
  10. 14. a homogeneous mixture is ____ mixed
  11. 15. the amount of electron is an element is ___ to the amount of protons
  12. 16. substances always have the ___ composition
  13. 17. mixtures can ___ in composition
  14. 18. 118 is the number of known _____
Down
  1. 1. electrons are located in the electron ____
  2. 2. substances and mixtures are ____ of matter
  3. 5. has a positive charge
  4. 9. Makes up everything takes up space
  5. 12. part in the middle of an atom
  6. 14. has a negative charge