Across
- 2. I am a stable element with 18 protons
- 4. I have a mass less than 1 amu
- 6. I have 7 protons
- 10. I have 6 valence electrons and 3 shells
- 13. this subatomic particle is located outside nucleus
- 14. makes up most of the mass in an atom
- 16. I am stable despite not having 8 valenece electrons
Down
- 1. charge of a proton
- 3. I am a metaloid with same shells as carbon
- 5. I have 10 protons
- 6. charge of a neutron
- 7. I have 6 valence electrons and 2 shells
- 8. I determine the identity of an elements atom
- 9. I have 2 valence electrons and 3 shells
- 11. I react similar to Sodium but I have less protons
- 12. charge of an electron
- 15. I also have a mass of 1 amu