Across
- 4. Mendeleev looked for these as he grouped elements
- 5. This group and the alkali metals are most reactive
- 7. each element wants its outer electron level
- 9. metals that form 2+ ions
- 11. element with 2,8,8,2 electrons in its 4 levels
- 13. This element would have similar properties with Li
- 15. electrons in the outer level
Down
- 1. groups or families are found in ___ columns
- 2. a row on the periodic table
- 3. Today’s PT is organized by this
- 6. Mendeleev predicted this element's existence
- 8. Elements in ___ have similar properties
- 10. Negatively charged ion
- 12. element that doesn't belong to any group
- 14. ____ or losing electrons allows ions to form