Atoms, Elements and Compounds

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Across
  1. 1. smallest particle of an element
  2. 4. made of only one type of atom
  3. 5. formed when two or more elements react and join together
  4. 8. centre of an atom
  5. 10. smallest particle of a compound
Down
  1. 2. on the left of the periodic table
  2. 3. table listing all elements in order of size
  3. 4. negatively charged, orbitting the nucleus
  4. 6. on the the right of the periodic table
  5. 7. centre of an atom
  6. 9. positively charged, in the nucleus