KRYPTON SUPERMAN'S WEAKNESS

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Across
  1. 3. _____ AT MINUS 251.25 DEGREES FAHRENHEIT.
  2. 4. THE _________ ARE UNSTABLE.
  3. 8. HAS ____________________ ISOTOPES.
  4. 9. DOESN'T ___________ WELL WITH OTHER ELEMENTS.
  5. 10. HAS 48 ___________.
  6. 12. IT'S A ___________ WHEN IT'S ROOM TEMPERATURE.
  7. 14. HAS 36 __________.
  8. 15. KRYPTON IS WHITE WHEN __________________.
  9. 18. WE DON'T KNOW IF IT'S ___________.
  10. 20. KRYPTON 86 IS THE ___________ OF ISOTOPES.
Down
  1. 1. KRYPTON ______________________ SMOKEY WHITE WHEN EXPOSED TO A ELECTRICAL CURRENT.
  2. 2. TURNS INTO ______________ WHEN A ELECTRIC CURRENT GOES THROUGH IT.
  3. 5. HAS FOUR _______________.
  4. 6. ONE OF THE __________ GASES ON EARTH.
  5. 7. IT'S ___________ IS 0.003733 GRAMS.
  6. 11. HAS 36 _____________.
  7. 13. KRYPTON 85 IS LARGELY _________.
  8. 16. USED FOR ________________.
  9. 17. KRYPTON 81 HAS A __________ OF 230,000 YEARS.
  10. 19. HAS A ______ WEIGHT OF 83.80.