THE PERIODIC TABLE CROSSWORD PUZZLE

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Across
  1. 1. AN INERT GAS THAT IS THE LIGHTEST MEMBER OF THE NOBLE GAS SERIES
  2. 3. A SILVERY WHITE METAL
  3. 9. A DARK RED FUMING TOXIC
  4. 10. A TOXIC IRRITANT PALE GREEN GAS
  5. 12. A LIGHT SILVERY GRAY METAL
  6. 13. A SOFT SILVER WHITE METAL IT IS THE LIGHTEST OF THE ALKALI METAL
  7. 15. A SILVER WHITE METAL OF THE ALKALINE EARTH SERIES
  8. 17. A MEMBER OF THE NOBLE GAS SERIES
  9. 18. A SOFT GRAY METAL
  10. 19. A SOFT SILVER WHITE REACTIVE METAL OF THE ALKALI METAL GROUP
Down
  1. 1. A COLORLESS, ODORLESS,HIGHLY FLAMABLE GAS
  2. 2. A NONMETAL WITH SEMICONDUCTING PROPERTIES
  3. 4. A RED BROWN METAL
  4. 5. A MEMBER OF THE NOBLR GAS OF LIQUID AND AIR USED IN LAMPS
  5. 6. A RARE SOFT SILVERY ACTIVE METAL OF THE ALKALI METAL GROUP
  6. 7. A HARD SILVERY WHITE METAL OF THE TRANSITION SERIES
  7. 8. A HARD SILVERY GRAY METAL OF THE TRANSITION SERIES
  8. 11. A RARE RADIOACTIVE GAS BELONGING TO THE NOBLE GAS SERIES
  9. 14. A STRONG, HARD MAGNETICS SILVARY GRAY METAL
  10. 16. A SOFT SILVERY WHITE METAL RESEMBLING THE RARE EARTH ELEMENTS