Atoms & Periodic Table

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Across
  1. 1. Positively charged particle in the nucleus of an atom.
  2. 7. The number of neutrons that Fluorine has
  3. 8. The number of electrons that Helium has
  4. 9. The number at the bottom that tells you the number of protons+neutrons (2 words)
  5. 10. A pure substance made of one type of atom
  6. 11. Negatively charged particle that zooms around the nucleus
  7. 13. Center of the atom that is made of protons and neutrons
  8. 15. the space around the nucleus where the electrons travel
Down
  1. 2. Neutral particle in the nucleus of atoms
  2. 3. The element with 55 protons
  3. 4. The element in Period 4, Family/Group 17
  4. 5. the number in the corner that tells you the number of protons and electrons (2 words)
  5. 6. A way to organize all known elements in the universe. (2 words)
  6. 9. The building blocks of matter
  7. 12. the number of electrons that the second and third orbital can hold in a Bohr Model
  8. 14. Anything that has mass or volume