Periodic table Crossword

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Across
  1. 3. Element with symbol Sn
  2. 6. Metals Present in Group 1
  3. 7. 4th element present in group 18
  4. 8. This gas is lighter than air and used in balloons
  5. 9. Element present in group 2 period 6
  6. 11. Atomic mass of sodium
Down
  1. 1. This element is the lightest and is a gas at room temperature
  2. 2. Name of group 2 elements
  3. 4. Elements present in group 17
  4. 5. Element with atomic mass 40 in period 4
  5. 10. This element is an alkali metal found in bananas