Across
- 2. the group at the end of the table
- 5. how many lanthanides are there?
- 7. how many rare or noble gases are there?
Down
- 1. both a Metalloid and a halogen
- 3. how many periods are there?
- 4. Transition metal period 5 group 11
- 6. the chemical symbol is Pb
- 7. alkaline metal group 1 period 1