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2. Window insulation - Wikipedia

   en.wikipedia.org/wiki/Window_insulation

   Most windows use argon (which is cheaper), but krypton is a better choice of insulation when the distance between the panes has to be smaller (the distance has to be about 13 mm (1 ⁄ 2 inch) for argon, and about 9 mm (3 ⁄ 8 inch) for krypton; increasing or decreasing the space will degrade performance).

3. Prices of chemical elements - Wikipedia

   en.wikipedia.org/wiki/Prices_of_chemical_elements

   This is a list of prices of chemical elements.Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison.

4. Insulated glazing - Wikipedia

   en.wikipedia.org/wiki/Insulated_glazing

   For example, the optimum thickness for krypton is lower than for argon, and lower for argon than for air. [10] However, since it is difficult to determine whether the gas in an IGU has become mixed with air at time of manufacture (or becomes mixed with air once installed), many designers prefer to use thicker gaps than would be optimum for the ...

5. Argon - Wikipedia

   en.wikipedia.org/wiki/Argon

   Argon is a chemical element; it has symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. [10] Argon is the third most abundant gas in Earth's atmosphere, at 0.934% (9340 ppmv).

6. Noble gas compound - Wikipedia

   en.wikipedia.org/wiki/Noble_gas_compound

   From the standpoint of chemistry, the noble gases may be divided into two groups: [citation needed] the relatively reactive krypton (ionisation energy 14.0 eV), xenon (12.1 eV), and radon (10.7 eV) on one side, and the very unreactive argon (15.8 eV), neon (21.6 eV), and helium (24.6 eV) on the other.

7. Krypton - Wikipedia

   en.wikipedia.org/wiki/Krypton

   Krypton-85 in the atmosphere has been used to detect clandestine nuclear fuel reprocessing facilities in North Korea [47] and Pakistan. [48] Those facilities were detected in the early 2000s and were believed to be producing weapons-grade plutonium. Krypton-85 is a medium lived fission product and thus escapes from spent fuel when the cladding ...