period 6 chem

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Across
  1. 2. this is the most reactive element in the periodic table
  2. 3. this group of elements is known as rare earth metals
  3. 6. this is the most unreactive group in the periodic table
  4. 8. this group of elements can't be found free in nature
Down
  1. 1. this i the largest group in the periodic table
  2. 4. this group of elements are very radioactive
  3. 5. this group has very toxic gases and the most reactive element
  4. 7. this is most reactive group in the periodic table