Science

12345678910
Across
  1. 2. Represented by the abbreviation O.
  2. 5. 1 or 2 letter abbreviation for the element.
  3. 8. What element has the atomic mass of 30.974?
  4. 9. Who discovered a set of patterns that applies to all the elements?
  5. 10. Chart showing all of the elements arranged according to their properties.
Down
  1. 1. Mendeleev created the first periodic table.
  2. 3. Color coded regions on the periodic table represent different classes of _______.
  3. 4. Modern periodic tables are arranged in order of increasing ________.
  4. 6. To show what something means.
  5. 7. Number of isotopes in an element.