Across
- 4. The phrase used to identify electrons on the outermost energy level
- 7. A table that organizes all the elements based on their properties
- 8. unreactive elements that make up group 18
Down
- 1. The vertical collums on the periodic table
- 2. The horizontal rows on the periodic table
- 3. Elements that are good conductors,shiny,malleable,and ductile
- 5. defines the identity of an atom
- 6. a pure substance made of only one atom