THE PERIODIC TABLE

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Across
  1. 3. part of an atom that as a positive electrical charge
  2. 7. table chart that organises information about all of the known elements according to their properties
  3. 8. substance that cannot be broken down into a simpler substance
  4. 9. smallest unit of an element
  5. 10. part of an atom that has a neutral electrical charge
Down
  1. 1. anything that has mass and volume
  2. 2. vertical column on the periodic table
  3. 3. horizontal row in the periodic table
  4. 4. the center of an atom, which contains the protons and neutrons
  5. 5. part of an atom that has a negative electrical charge
  6. 6. symbol the letter(s) that represent(s) the name of an element