Kayla Gleckler Chapter 9

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Across
  1. 2. A chart in which all known elements are listed in order of atomic number.
  2. 4. An extremely small negatively charged subatomic particle found outside the atomic nucleus.
  3. 6. A count of the number of protons in the atomic nucleus.
  4. 7. A representation of an object on some convenient scale
  5. 8. Any material that is made up of only one type of atom.
  6. 10. a positively charged subatomic particle in the atomic nucleus
Down
  1. 1. A representation of a system that helps us predict how the system behaves.
  2. 3. Any member of a set of atoms of the same element.
  3. 5. An electrical neutral subatomic particlein the automic nucleus.
  4. 9. Any subatomic particle found in the atomic nucleus