topic 1

1234567891011121314
Across
  1. 2. Table of elements arranged in order of atomic number and such that elements with similar properties are in the same column
  2. 5. particle occurring in all atomic nuclei
  3. 7. A separation technique used to produce solid crystals from a solution by evaporating the solvent
  4. 8. A chemical reaction in which a more reactive element displaces a less
  5. 10. particle of about the same mass as a proton but without an electric charge
  6. 12. A method of separating a mixture of substances according to their different boiling points
  7. 14. The total number of protons and neutrons in the nucleus.
Down
  1. 1. A separation technique used to separate solids from liquids.
  2. 3. particle with a charge of negative electricity
  3. 4. element from its compound.
  4. 6. the smallest particle of a chemical element that can exist.
  5. 7. A substance made up of two or more types of atoms chemically combined together.
  6. 9. Elements that react to form positive ions. Found to the left and towards the bottom of the periodic table.
  7. 11. two or more elements or compounds not chemically combined together
  8. 13. The elements in Group 1 of the periodic table.