Xenon and fluorine combine readily. Xenon tetrafluoride is a colorless crystalline material, stable at room remperature. The existence of at least one other fluoride and two oxyfluorides has been demonstrated. The heaviest "inert gas," radon, also reacts with fluorine, yielding a compound less volatile than xenon tetrafluoride.
M EASUREMENTS have been carried out by Bridgman 1 on the variation of resistance with pressure in tellurium, the resistance falling off by a factor of several hundreds in the range of measurements. As pointed out by Bardeen 2 this effect can be
Ions emitted from the surface of electrically heated filaments on which solutions of uranium had been evaporated were It wag demonstrated that by control of the oxidizing and studied with a modified Bendix time-of-flight mass spectrometer. redwing agents on a heated filnrnent and in the surrounding atmosphere the species of emitted ions can be controlled Oxidizing agents (e.g., oxygen) uc2 +, u +, uo +, UOa +, u03Reducing agents (e.s., carbon)The gascous species UCI+ has been observed.
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