Chapter 9 Atoms and the Periodic Table- Raegan Fisher

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Across
  1. 3. a positively charged subatomic particle in the atomic nucleus
  2. 6. an abbreviation for an element of atom
  3. 7. any material that is made up of only one type of atom
  4. 9. Table a chart in which all known elements are listed in order of atomic number
Down
  1. 1. a count of the number of protons in the atomic nucleus
  2. 2. the dense, positively charged center of every atom
  3. 4. any member of a set of atoms of the same element whose nuclei contain the same number of protons but different number of neutrons
  4. 5. an extremely small, negatively charged subatomic particle found in the cloud outside the atomic nucleus
  5. 6. the mass of an element's atoms; listed in the periodic table as an average value based on relative abundance of the element's isotopes
  6. 8. an electrically neutral subatomic particle in the atomic nucleus