Krypton

12345678910111213
Across
  1. 1. in 1960, krypton-86 was used to define the length of the ______
  2. 4. along with ____, krypton is used as filling gas in fluorescent lightbulbs
  3. 5. one of the hotspots mantle was collected from
  4. 9. developed by nuclear physicists to count krypton atoms
  5. 11. krypton has been used to estimate ______ production
  6. 12. radiometric krypton dating is used to determine the age of ______
  7. 13. gas krypton is a _______ on the periodic table
Down
  1. 2. krypton-81 decays slowly and is _____
  2. 3. krypton-81 is the product of reactions with ________
  3. 6. krypton is an inert gas and is classified as an ______
  4. 7. One of the scientists who discovered krypton in 1898
  5. 8. krypton was found here and gives us information about how the Earth was formed
  6. 10. krypton-83 is ____