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Solid hydrogen is the solid state of the element hydrogen, achieved by decreasing the temperature below hydrogen's melting point of 14.01 K (−259.14 °C; −434.45 °F). It was collected for the first time by James Dewar in 1899 and published with the title "Sur la solidification de l'hydrogène" (English: On the freezing of hydrogen) in the ...
Hydrogen peroxide is a chemical compound with the formula H 2 O 2.In its pure form, it is a very pale blue [5] liquid that is slightly more viscous than water.It is used as an oxidizer, bleaching agent, and antiseptic, usually as a dilute solution (3%–6% by weight) in water for consumer use and in higher concentrations for industrial use.
The spectrum of NeH includes lines at 1.81, 1.60 and 1.46 eV, with a small band at 1.57 eV [49] The bondlength in NeH is calculated as 1.003 Å. [48] A helium neon excimer can be found in a mixed plasma or helium and neon. [50] Some other excimers can be found in solid neon, including Ne + 2 O − which has a luminescence peaking around 11.65 ...
Animation showing the crystal structure of beta-fluorine. Molecules on the faces of the unit cell have rotations constrained to a plane. At room temperature, fluorine is a gas of diatomic molecules, [5] pale yellow when pure (sometimes described as yellow-green). [43] It has a characteristic halogen-like pungent and biting odor detectable at 20 ...
It will, however, react directly with fluorine (F 2) at room temperature to form tungsten(VI) fluoride (WF 6), a colorless gas. At around 250 °C it will react with chlorine or bromine, and under certain hot conditions will react with iodine. Finely divided tungsten is pyrophoric. [36] [37]
[1]: 625 As given in the example of 3-methylhexane and its higher homologues, branched hydrocarbons can be chiral. [1]: 627 Chiral saturated hydrocarbons constitute the side chains of biomolecules such as chlorophyll and tocopherol. [2] Unsaturated hydrocarbons, which have one or more double or triple bonds between carbon atoms.
Note: The asterisk is replaced by the compatibility code Division 1.4 Explosives – Very insensitive substances which have a mass explosion hazard Note: The asterisk is replaced by the compatibility code Division 1.5 Explosives – No hazard statement Note: The asterisk is replaced by the compatibility code Division 1.6
The underground mine gas term for foul-smelling hydrogen sulfide-rich gas mixtures is stinkdamp. Hydrogen sulfide is a highly toxic and flammable gas (flammable range: 4.3–46%). It can poison several systems in the body, although the nervous system is most affected.