Chapter 9-allie herr21

12345678910
Across
  1. 2. vertical column in the periodic table; also known as a family elements
  2. 4. positively charged subatomic particle in the atomic nucleus
  3. 5. member of a set of atoms of the same element whose nuclei contain the same number of protons
  4. 6. any material that is made up of only one type of atom
  5. 8. a representation of an object on some convenient scale
  6. 9. electrically neutral subatomic particle in the atomic nucleus
  7. 10. horizontal row in the periodic table
Down
  1. 1. small, discrete packet of light energy
  2. 3. a device that uses a prism or diffraction grating to separate light into its color components
  3. 7. extremely small, negatively charged subatomic particle