Across
- 7. Element at group 1, period 4
- 9. Family name for group 2
- 10. Family name for group 18
- 12. Last name of chemist who grouped elements by atomic number
- 15. Metal with atomic number of 26
- 16. Last name of chemist who grouped elements based on similar mass and properties
- 17. Metalloid with an atomic number of 5
Down
- 1. Family name for group 1
- 2. Family name for group 17
- 3. Name for vertical columns
- 4. Elements that are dull with poor conductivity
- 5. Majority of the elements are classified as
- 6. Name for horizontal rows
- 8. Family name for groups 3-12
- 11. Our periodic table is listed in order of increasing
- 13. Nonmetal with atomic number of 53
- 14. Elements in the stair-step