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