Across
- 3. Recognized that atomic numbers is the basis for the organization of the periodic table
- 6. credited for designing the first periodic table
- 7. Reacts with water to make strong base
- 10. low melting point (are usually gases)
Down
- 1. iron is in this group
- 2. hydrogen is in this group
- 4. good conductor of heat and electricity
- 5. silicon is in this group
- 8. Mendeleev organized the elements in order of increasing atomic
- 9. shape can be easy or hard to change