Classifying Matter

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Across
  1. 3. Is a type of substance containing atoms of two or more different elements chemically bonded to together.
  2. 7. A type of mixture in which the individual substances are not evenly mixed.
  3. 8. The combination of symbols and numbers that represent a compound.
  4. 9. To form a solution by mixing evenly.
  5. 11. An area around the nucleus that electrons move through.
  6. 12. A black solid.
  7. 13. Are between metals and nonmetals on the periodic table.
  8. 15. Is a substance that consists of just one type of atom.
  9. 18. Is a gas that enables fuels to burn.
  10. 19. The center of an atom.
  11. 20. Is anything that has mass and takes up space.
Down
  1. 1. These move quickly through an area around the nucleus.
  2. 2. Is the opposite of a heterogeneous mixture.
  3. 4. A type of metal.
  4. 5. These are on the left side of the periodic table.
  5. 6. Has a positive charge.
  6. 10. Is matter with a composition that is always the same.
  7. 14. It is the building block of matter.
  8. 16. Is matter that can vary in composition.
  9. 17. The atomic mass minus the atomic number.