Across
- 4. 8th element of the periodic table
- 6. Subatomic particles within the nucleus that, when added to the number of protons, gives the atom it's atomic mass and has a negative charge
- 8. 47th element of the periodic table
- 9. center of the atom containing protons and neutrons
- 10. 55th element of the periodic table
Down
- 1. 18th element of the periodic table
- 2. the seventh family of the periodic table and has 7 valence electrons
- 3. 1th element of the periodic table
- 5. 4th element of the periodic table
- 7. 18th element of the periodic table