chemisty

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Across
  1. 1. who coined the term atom?
  2. 5. How many Hologens are on the PTE?
  3. 8. who did the gold foil experiment?
  4. 9. which element have an atomic # of 6?
Down
  1. 2. who made the discovery of the nucleus?
  2. 3. How many Alkali earth metals are on the PTE?
  3. 4. who made the discovery of electrons?
  4. 6. How many Noble gases are on the PTE?
  5. 7. who confirmed the existence of neutrons?