Across
- 2. The charge of an electron
- 6. What family the periodic table is divided by
- 7. An electron in the outermost energy level of the atom
- 9. The more uncommon type of atom
Down
- 1. Designer of the periodic table
- 3. Family 1A on the periodic table
- 4. Another word for groups on the periodic table
- 5. The charge of a proton
- 8. Another word for periods on the periodic table
- 9. The normal type of atom