Terms for Part 2 of Chemistry Unit

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Across
  1. 4. A mixture which has uniform composition and properties throughout.
  2. 6. The smallest unit of a compound that has the characteristics of the compound.
  3. 7. A mixture without uniform composition or properties throughout.
  4. 9. The center of an atom with most of the atom's mass.
  5. 11. In this type of system, matter can get in and out.
  6. 12. Positively charged particle in the nucleus.
  7. 16. Located outside the nucleus and has a negative charge.
  8. 17. The smallest unit of matter that forms an element.
  9. 18. This table contains all of the known elements.
  10. 19. The Law of Conservation of Mass indicates this cannot be created or destroyed.
Down
  1. 1. This is the charge of a neutron.
  2. 2. Two or more elements chemically combined.
  3. 3. This is the charge of a proton.
  4. 5. A pure substance that cannot be broken down.
  5. 6. Two or more substances mingled together in which they keep their identities.
  6. 8. Particle in the nucleus with no charge.
  7. 10. This compound is also known as sodium chloride.
  8. 13. Hydrogen and this element join together to form water.
  9. 14. This is the charge of an electron.
  10. 15. Matter cannot get in or out of this type of system.