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