science

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Across
  1. 4. A number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound
  2. 5. Anything that has mass and takes up space
  3. 7. mixture A mixture in which substances are evenly distributed throughout the mixture, cannot see parts but can be separated
  4. 9. A substance made up of atoms of two or more different elements joined by chemical bonds (chemically combined)
  5. 11. smallest unit of most compounds
Down
  1. 1. A combination of two or more substances that are not chemically combined
  2. 2. A one or two letter representation of an element
  3. 3. mixture A mixture in which different materials can be seen easily, substances can be in any amount
  4. 6. Symbols that show the elements in a compound and the ratio of atoms
  5. 8. Smallest particle of an element
  6. 10. A pure substance made of only one kind of atom
  7. 12. The study of the properties of matter and how matter changes