Across
- 2. Metals have a ______ melting point
- 3. Calcium is
- 5. recognized that atomic number, not atomic mass, is the basis of the organization of the periodic table
- 6. developed the first type of periodic table but wasn't finished due to incompleteness
Down
- 1. Metalloids ______ can be easy or hard to change
- 3. published the first periodic table
- 4. Nonmetals are _____ conductors of heat and electricity