Periodic Table Challenge 2

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Across
  1. 3. The element in Period 6 and Group 2
  2. 4. Symbol for an element in the same group as Oxygen
  3. 6. A yellow precious metal
  4. 7. The only liquid metal
  5. 8. The heaviest element in Nature
  6. 11. The element that makes up 79% of the air
  7. 14. A metal in the same group as Carbon
  8. 15. The lightest element
  9. 16. A solid yellow nonmetal
Down
  1. 1. The symbol for Lead
  2. 2. The scientist who discovered Radium and first woman to win the Nobel Prize
  3. 4. A semimetal in the same group as Carbon
  4. 5. The symbol for Silver
  5. 9. The scientist who discovered the Periodic Table
  6. 10. The symbol for Tin
  7. 12. A metal in the same group as Carbon
  8. 13. A radioactive metal
  9. 15. The second lightest element