Across
- 2. Made of one type of atom.
- 4. The smallest particle of an element that has the properties of that element.
- 5. A letter that represents an element.
- 7. Vertical columns on the periodic table.
- 8. The horizontal rows on the periodic table.
Down
- 1. Good conductors of electricity; reflective solids at room temperature.
- 3. Represents the number of protons in the nucleus of an atom
- 6. The center of an atom that holds the protons and neutrons.