Across
- 3. The first noble gas on the periodic table
- 6. The process of which ions are formed by gain or loss of an electron
- 9. Negatively charged subatomic particle
- 11. The element symbol K
- 12. The rows on a periodic table
- 13. The mass of an atom
- 14. Atomic number 13
- 15. Positively charged subatomic particle
Down
- 1. Atomic number 20
- 2. The columns on a periodic table
- 4. Atoms with same# of protons but different # of neutrons
- 5. Atomic number 10
- 7. The number of protons in a atom
- 8. Neutrally charged subatomic particle
- 10. Atomic number 79