PTE menu assignment

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Across
  1. 3. the same element but in a different form
  2. 5. have a neutral charge and are found in the nucleus
  3. 6. the element name of H
  4. 10. the periodic table of ________
Down
  1. 1. democritus coined the term ____
  2. 2. metals are good __________ of heat and electricity
  3. 4. have a positive charge and are found in the nucleus
  4. 7. _______ theory states that all substances are made up of atoms
  5. 8. found in the electron cloud and has a negative charge
  6. 9. take up most of the periodic table