Emma Vance's Scientific Cross of the Words

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Across
  1. 1. vertical column in the periodic table
  2. 5. mass of an element's atoms; listed in the periodic table as an average value based on the relative abundance of the element's isotopes.
  3. 8. member of a set of atoms of the same element whose nuclei contains the same number of protons but different numbers of neutrons.
  4. 9. abbreviation for an element or atom.
  5. 10. subatomic particle found in the atomic nucleus.
Down
  1. 2. a representation of an object on some convenient scale.
  2. 3. small, discrete packet of light energy.
  3. 4. positively charged subatomic particle in the atomic nucleus.
  4. 6. device that uses a prism or diffraction grating to separate light.
  5. 7. any material that is made up of only one type of atom.