Across
- 1. Nobody cares about these particles
- 3. Incredibly light particles
- 5. Electrons in the outermost energy level
- 7. Number of electrons found in the second energy level
- 8. Usually has 4 neutrons
- 9. Atom found in table salt
- 13. Atomic number tells you how many there are
- 14. Atomic number 86
- 16. Heaviest naturally occurring element
- 17. Chemical symbol Au
Down
- 2. Type of atom
- 4. Row in the periodic table
- 6. Atom found in table salt
- 10. Metal that is liquid at room temperature
- 11. Element who is not welcome in its group
- 12. Column in the periodic table
- 15. Centre of the atom