The Atom

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Across
  1. 2. The most common form of carbon in nature is...?
  2. 4. The modern theory of the atom is electrons move around the nucleus like a...?
  3. 5. A pure form of matter that cannot be broken down into a simpler substance.
  4. 6. The finger print of the atom.
  5. 9. The smallest part of a chemical that can exist.
  6. 12. A neutral subatomic particle in the atom.
  7. 15. Atoms of the same element that have different number of neutrons.
Down
  1. 1. If an atom was blown up the size of a football stadium, then it's nucleus would be the size of a...
  2. 3. The middle of the atom, which is very dense!
  3. 7. This scientist had a theory that atoms were like chocolate cookies.
  4. 8. So so small, that they are basically mass-less.
  5. 10. In Carbon-14, there are _______ neutrons in the nucleus.
  6. 11. The word "atom" comes from the Greek term...?
  7. 13. The charge of a proton is...?
  8. 14. This scientist had a theory that an atom was like the solar system where particles orbit around a nucleus!