Science

Edit Answers
12345678910111213
Across
  1. 3. Cu
  2. 6. the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table.
  3. 8. a substance made up of various types of particles that occupies physical space
  4. 9. a mixture in which the composition is uniform throughout the mixture.
  5. 11. the smallest particle of a substance that has all of the physical and chemical properties of that substance.
  6. 12. H20
Down
  1. 1. A substance that has a fixed chemical composition throughout
  2. 2. a thing that is composed of two or more separate elements
  3. 4. a mixture in which the composition is not uniform throughout the mixture.
  4. 5. a subatomic particle found in the nucleus of every atom.
  5. 7. a substance made by mixing other substances together.
  6. 10. a substance that cannot be broken down into simpler components by any non-nuclear chemical reaction.
  7. 13. the smallest particle of a chemical element that can exist.