Across
- 3. The name of the elements in group 7 (17) of the periodic table
- 6. Elements in the same group have similar chemical __________
Down
- 1. The name of a vertical column on the periodic table
- 2. This element is a toxic yellow-green gas
- 4. The most reactive Halogen
- 5. This is the rarest element found in the earths crust