Across
- 4. Organization of elements
- 5. Electrons that are in the outer-most energy level
- 8. Group 2 metals
- 9. Horizontal rows
- 10. Vertical columns, also called chemical families.
Down
- 1. Metals that have 1 valence electron
- 2. Russian chemist who organized the table by atomic mass
- 3. Conduct heat and electricity; found at the left of the staircase and bottom two rows
- 6. Group 18 gases that are rarely reactive.
- 7. Have 7 valence electrons