Periodic table

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