Across
- 3. introduced atomic theory
- 5. Discovered the first ion
- 8. Columns on the periodic table
- 10. Number of protons and neutrons in the nucleus
- 12. Every solid, liquid, gas, and plasma is composed of this
- 13. Can be used as a dietar supplememnt and has an atomic mass of 40
- 14. Rows on the periodic table
- 16. Does not have the properties of a metal
Down
- 1. Subatomic particle with a positive charge
- 2. Has an atomic number of 11
- 4. helium, neon, argon, krypton, xenon, and radon are...
- 6. electron outer shell of an electron
- 7. Greek philosopher
- 9. a negatively charged ion
- 10. Calculated in amu(s)
- 11. Subatomic particle with a neutral charge
- 15. Fluorine, Bromine Chlorine & Iodine are…