Across
- 3. All of these elements have 3 shells
- 5. Gaining electrons
- 6. Where most of the mass of an atom is found
- 7. Most electronegative atom
- 9. Losing electrons
- 10. Charge of an atom
- 11. Who made the periodic table of elements
- 12. Most unstable alkali metal
Down
- 1. A brown liquid that will displace Iodine
- 2. The all have variable oxidation states
- 4. Colour of chlorine gas
- 8. Group 6, period 4