Across
- 1. gases the elements in group 8A of the periodic table
- 2. mass unit one twelfth the mass of a carbon-12 atom
- 4. law the pattern of repeating properties displayed by elements in the periodic table
- 6. earth metals the elements in group 2A of the periodic table
- 7. elements with properties that fall between those of metals and nonmetals
- 10. electron an electron that is in the highest occupied energy level of an atom
- 11. metals metals that form a bridge between elements on the left and right sides of the periodic table
Down
- 1. elements that are poor conductors of heat and electric current
- 2. metals the elements in group 1A of the periodic table, not including hydrogen
- 3. the elements in group 7A of the periodic table
- 4. table an arrangement of elements in columns, based on a set of properties that repeat from row to row
- 5. a column of elements in a periodic table
- 8. elements that are good conductors of heat and electric current
- 9. a row in a periodic table of elements