Isotope Of Hydrogen

  

Stable isotopes of hydrogen available from ISOFLEX

  1. Isotope Of Hydrogen Symbol

Isotopes of hydrogen 1 Isotopes of hydrogen The three most stable isotopes of hydrogen: protium (A = 1), deuterium (A = 2), and tritium (A = 3). Hydrogen (H) (Standard atomic mass: 1.00794 u) has three naturally occurring isotopes, sometimes denoted 1H, 2H, and 3H. Other, highly unstable nuclei (4H to 7H) have been synthesized in the laboratory. Aug 13, 2020 In this case where H-X bond breaking or forming is not part of the rate limiting step, then the isotope effect will be much smaller and is known as a secondary isotope effect. The position of equilibrium reactions that involve hydrogen exchange, (2.8.12), will be effected by the presence of deuterium to favor the deuterium being concentrated in.

IsotopeZ(p)N(n)Atomic MassNatural AbundanceEnrichment LevelChemical Form
Deuterium112.0141017780.0115%>99.00%Heavy Water
Isotopes

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Hydrogen was discovered in 1766 by Henry Cavendish, who also independently discovered nitrogen. Its name derives from the Greek words hydro and genes, meaning “water-generator” or “water-creator.”

The most abundant element in the universe, hydrogen is a colorless, odorless, tasteless gas that is also flammable, burning in the air with a popping sound. It combines explosively with oxygen at ordinary temperatures in the presence of finely divided metals. Explosion of its mixture with chlorine is detonated by sunlight, heat or spark. It also combines explosively with halogens, and it autoignites at 574 ºC.

Hydrogen is lighter than air and is slightly soluble in water. It forms the largest number of chemical compounds — more than any other element, including carbon — and is a component of all mineral acids, ammonia, natural gases and hydrocarbons, as well as a vast number of organic compounds, from simple alcohols and aldehydes to complex proteins, carbohydrates and chlorophyll.

The first hydrogen-filled balloon was invented by Jacques Charles in 1783. German Count Ferdinand von Zeppelin later promoted the idea of rigid airships lifted by hydrogen that later were called Zeppelins, the first of which had its maiden flight in 1900. Hydrogen-lifted airships were used as observation platforms and bombers during World War I. Hydrogen has also been used as a coolant in turbogenerators, as battery fuel, for the processing of fossil fuels, in the production of ammonia, as a hydrogenating agent for food oils, and in the production of methanol. Sky blocking nordvpn. It is used as a tracer gas for minute leak detection, as a shielding gas in welding, and in cryogenic research.

Properties of Hydrogen

Isotope of hydrogen
NameHydrogen
SymbolH
Atomic number1
Atomic weight1.0079
Standard stateGas at 298 °K
CAS Registry ID1333-74-0
Group in periodic table1
Group nameNone
Period in periodic table1
Block in periodic tables-block
ColorColorless
ClassificationNonmetallic
Melting point-259.14 °C
Boiling point-252.87 °C
Thermal conductivity0.1805 W/(m·K)
Electronegativity2.20
Heat of vaporization0.452 kJ·mol-1
Heat of fusion0.558 kJ·mol-1
Density of gas0.088 g/cm3
Density of liquid0.00708 g/cm3
Density of solid0.086 g/cm3
Electron configuration1s1
Lower explosive limit 4%
Upper explosive limit 75%
Oxidation states -1 and +1
Critical temperature -240.18 ºC
Critical pressure 12.76 atm
Critical volume 65 cm3/mo
Velocity of sound 1,269.5 m/sec at 0 ºC
Diffusion coefficient in air 0.634 cm2/sec at 0 ºC

Research

Isotope Of Hydrogen

Isotope Of Hydrogen Symbol

  • Quantum dynamical investigation of the isotope effect in H2 formation on graphite at cold collision energies
  • Kinetic isotope effects for fast deuterium and proton exchange rates
  • Discrimination of the species and authenticity of Rhizoma Coptidis based on stable isotope and multielement fingerprinting and multivariate statistical analysis
  • Multi proxy approach to evaluate and delineate the potential of hot springs in the Kotli District (Kashmir, Pakistan)
  • Stable isotopes in yellow-bellied marmot (Marmota flaviventris) fossils reveal environmental stability in the late Quaternary of the Colorado Rocky Mountains