ATOMS AND ELEMENTS

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Across
  1. 2. / the periodic table is divided into rows called
  2. 8. / an atom of an element with a different number of neutrons
  3. 9. / elements which display characteristics of both metals and non metals
  4. 10. / negatively charged particle
  5. 11. / the electrons in the outermost shell of an atom
  6. 13. / particles with no charge
Down
  1. 1. / creator of the periodic classification of elements
  2. 3. / the periodic table is divided into columns called
  3. 4. / basic unit of matter
  4. 5. / the periodic table is divided into columns called
  5. 6. / 6.02 x10 to the power of 23
  6. 7. / positively charged particle
  7. 12. / the _____ number corresponds to the number of electrons in an atom