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1) Fe + H 2 O → FeO + H 2 2) Fe + 3 H 2 O → Fe 2 O 3 + 3 H 2 3) Fe + 4 H 2 O → Fe 3 O 4 + 4 H 2. Many metals react similarly with water leading to the production of hydrogen. [68] In some situations, this H 2-producing process is problematic as is the case of zirconium cladding on nuclear fuel rods. [69]
Hydrogen (1 H) has three naturally occurring isotopes: 1 H, 2 H, and 3 H. 1 H and 2 H are stable, while 3 H has a half-life of 12.32(2) years. [3] [nb 1] Heavier isotopes also exist; all are synthetic and have a half-life of less than 1 zeptosecond (10 −21 s). [4] [5] Of these, 5 H is the least stable, while 7 H is the most.
74-85-1 C 2 H 4 Cl 2: ethylene dichloride: 107-06-2 C 2 H 4 N 4: ... Chemical formula Synonyms CAS number CaAl 2 O 4: calcium aluminate: 12042-68-1 CaB 6: calcium ...
In organic chemistry, a vinyl group (abbr. Vi; [1] IUPAC name: ethenyl group [2]) is a functional group with the formula −CH=CH 2. It is the ethylene (IUPAC name: ethene) molecule (H 2 C=CH 2) with one fewer hydrogen atom. The name is also used for any compound containing that group, namely R−CH=CH 2 where R is any other group of atoms.
Formula: D 2 or 2 1 H 2. Density: 0.180 kg/m 3 at STP (0 °C, 101325 Pa). Atomic weight: 2.0141017926 Da. Mean abundance in ocean water (from VSMOW) 155.76 ± 0.1 atoms of deuterium per million atoms of all isotopes of hydrogen (about 1 atom of in 6420); that is, about 0.015% of all atoms of hydrogen (any isotope) Data at about 18 K for 2 H 2 ...
Depiction of a hydrogen atom showing the diameter as about twice the Bohr model radius. (Image not to scale) A hydrogen atom is an atom of the chemical element hydrogen.The electrically neutral hydrogen atom contains a single positively charged proton in the nucleus, and a single negatively charged electron bound to the nucleus by the Coulomb force.
An example of the difference is the empirical formula for glucose, which is CH 2 O (ratio 1:2:1), while its molecular formula is C 6 H 12 O 6 (number of atoms 6:12:6). For water, both formulae are H 2 O. A molecular formula provides more information about a molecule than its empirical formula, but is more difficult to establish.
Hydrogen deuteride is an isotopologue of dihydrogen composed of two isotopes of hydrogen: the majority isotope 1 H and 2 H . Its proper molecular formula is 1 H 2 H, but for simplification, it is usually written as HD.