Across
- 7. weighted average of the masses of the occurring isotopes
- 8. A set of elements on increasing atomic mass
Down
- 1. elements that have some line on the periodic table
- 2. An Abbreviation for the element's name
- 3. elements that are shiny and conduct heat and electricity well
- 4. poor conductors of heat and electricity
- 5. A vertical column of elements on the periodic table
- 6. Each horizontal row of elements on the periodic table