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Across
  1. 4. the smallest particle of a chemical element that can exist.
  2. 5. A separation technique used to separate solids from liquids.
  3. 8. two or more elements or compounds not chemically combined together
  4. 9. particle with a charge of negative electricity
  5. 10. A separation technique used to produce solid crystals from a solution by evaporating the solvent
  6. 11. A chemical reaction in which a more reactive element displaces a less
  7. 12. Elements that react to form positive ions. Found to the left and towards the bottom of the periodic table.
  8. 13. particle of about the same mass as a proton but without an electric charge
Down
  1. 1. A method of separating a mixture of substances according to their different boiling points
  2. 2. A substance made up of two or more types of atoms chemically combined together.
  3. 3. The total number of protons and neutrons in the nucleus.
  4. 4. The elements in Group 1 of the periodic table.
  5. 6. particle occurring in all atomic nuclei
  6. 7. Table of elements arranged in order of atomic number and such that elements with similar properties are in the same column