Englishman e Rutherford and Frenchman m Curie discovered that radium radiation consists of α, β and γ rays.
Radon 222 was discovered by Dorn in Germany.
Gomberg found triphenylmethyl in the United States.
A.D. 190 1 year
American G.N. Lewis put forward the concept of fugacity.
Grignard reagent invented by Frenchman F.A.V. Grignard
AD 1902
France's M. Curie and P. Curie separated 90 mg of radium chloride.
German W. ostwald accurately defined catalysis.
AD 1903
Rutherford and Soddy in England put forward the theory of radioactive transmutation.
AD 1906
Russian m·с· Tswett invented chromatographic analysis.
German H. Fischer proposed the polypeptide structure of protein and synthesized the polypeptide with molecular weight of 1000.
AD 1907
The concept of activity was put forward by American G.N. Lewis.
AD 1909
Phenolic resin produced by Baekeland Company, USA.
F. Harper's synthetic ammonia experiment in Germany was successful.
AD 19 10
Sodium butadiene rubber produced by Lebedev company in Russia
19 1 1 year.
E Rutherford of England put forward the nuclear model of atom.
AD 19 12
Austrian Fritz fritz pregl established microanalysis of organic elements.
German W. H. Nernst proposed the third law of thermodynamics.
M von Laue of Germany discovered the diffraction of X-rays by crystals.
Hevesy of Sweden and Pane of Germany founded radioactive tracer atomic method.
Polyvinyl acetate made by German F. Clutter and A. Roulet.
AD 19 13
Bohr of Denmark put forward the theory of hydrogen atom structure in quantum mechanics.
The Prague -wulff equations were obtained by W.L. Prague in Britain and гв wulff in Russia respectively.
Soddy, an Englishman, put forward the concept of isotope.
K. Fajans discovered praseodymium 234 in the United States
The Englishman H.G.J Moselle confirmed that the atomic number is equal to the number of positive charges in the nucleus.
M Bodenstein of Germany put forward the concept of chain reaction in chemical reaction.
British J.J. Tang Musun and F.W. Aston found that neon has stable isotopes neon 20 and neon 22.
AD 19 16
German W Kausel put forward the theory of electricity price bond.
American G.N. Lewis put forward the valence bond theory of * *
Ilangumuir of the United States derived the adsorption isotherm equation.
Debye in the Netherlands and scherer in Switzerland invented the X-ray powder method.
Advertisement 19 19
The British F.W. Aston made the mass spectrometer.
The Englishman e Rutherford discovered the artificial nuclear reaction.
AD 1920
German H. staudinger founded the theory of polymer linear chain.
A.D. 192 1 year
Homomorphism discovered by Hahn in Germany
AD 1922
Polarography was invented by Heyrovsk, Jaroslav in Czechoslovakia.
AD 1923
Danish J.N. bruns put forward the theory of acid-base proton.
American g.n. Lewis put forward Lewis acid-base theory.
P Debye of Britain and E Hooker of Germany put forward the electrostatic theory of strong electrolyte dilute solution.
AD 1924
The Germans W.O. Herman and W. Hanel made polyvinyl alcohol.
France L.-V de Broglie put forward the hypothesis that particles such as electrons have wave-particle duality.
AD 1925
American H.S. Taylor put forward the active center theory of catalysis.
AD 1926
E Schrodinger of Austria put forward the wave equation of particle motion.
The concept of ion association was put forward by N.J. Buyelm of Denmark.
AD 1927
The branch chain reaction theory was put forward by H H Semenoff of the Soviet Union and C N Hinsherwood of Britain respectively.
German H. Goldschmit put forward the law of crystallization chemistry.
AD 1928
Raman spectrum discovered in India
The sea of England, London and Australia of England.
Dili Schrodinger founded the molecular orbital theory.
The synthesis of dienes was discovered by O.P.H Diels and K. Alder in Germany.
AD 1929
A. Fleming discovered penicillin in England.
German A.F.J. Butenandt and others separated and clarified the structure of sex hormones.
AD 1930
Hinsherwood, an Englishman, put forward the theory of catalytic intermediates.
A.D. 193 1 year
Deuterium (heavy hydrogen) was discovered by H.C. Yuri of the United States.
American Pauling and Slater put forward the hybrid orbital theory.
AD 1932
J. chadwick discovered neutrons in England
Chinese chemical society was founded.
AD 1933
American L.C. Pauling put forward the theory of * * * vibration.
E. making styrene-butadiene rubber with Chunkel.
AD 1934
French Iorio and Iorio Curie discovered artificial radioactivity.
British e.w. Fossett and others made high-pressure polyethylene.
Tritium discovered in Rutherford, England
W. Kuhn put forward the statistical theory of polymer chains.
AD 1935
H. Eileen of the United States, J.C. Polani and A.G. Evans of Britain put forward the theory of reaction rate transition state.
Poly (hexamethylene adipamide) was prepared by W.H. carothers of the United States.
Ion exchange resin synthesized by British B.A. Adams and E.L. Holmes.
AD 1937
Technetium was artificially made by Italian C. Periel and American E.G. segre.
Polyurethane produced by Bayer company in Germany
British Imperial Chemical Industry Company produces soft PVC.
AD 1938
German p. schlaszler controls the formation of polycaprolactam.
The phenomenon of nuclear fission of uranium was discovered by O. Hahn of Germany.
AD 1939
The discovery of francis m. pere.
American P.J. Flory put forward the kinetic equation of polycondensation reaction.
AD 1940
Macmillan and Abelson in the United States made neptunium artificially.
Plutonium is manufactured by Americans G.T. Seeburg and E.M. Macmillan.
D.R. Coulson and E.G. segre of the United States discovered astatine.
Spontaneous fission was discovered by гн flerov and ка Petrzhak of the Soviet Union.
A.D. 194 1 year
Polyethylene terephthalate made by J.R. winfield and J.T. Dixon in England.
AD 1942
Italian e fermi and others built nuclear reactors in the United States.
Americans P.J. Flory and M.L. Huggins put forward the theory of polymer solution.
AD 1943
Streptomycin was isolated from Streptomyces by S.A. Wachsman.
AD 1944
Americium was manufactured by G.T. Seeburg, R.A. James and L.O. Morgan.
Americans G.T. Seeburg, R.A. James and A. Joso made curium artificially.
Synthesis of quinine base by R.B. Woodward in the United States
American G.T. Seeburg established the theory of actinides.
AD 1945
Swiss G.K. Schwarzenbach used disodium EDTA for complexometric titration.
Southern Rubin developed button cell.
The American J.A. Malinschi and L.E. Glenn Ding Ning separated promethium.
AD 1949
Technetium is manufactured by Thompson, Joso and Seeburg in the United States.
AD 1950
Californium is made artificially by S.G. Thompson, K.Jr streeter, A.Joso and G.T. Seeburg in the United States.
Culkin of the Soviet Union put forward three physical states of amorphous polymers (glassy state, high elastic state and viscous state).
AD 1952
A Qiao Suo and others in the United States found polonium and americium in the sediments after the hydrogen bomb test.
Kenichi Fukui of Japan put forward the frontier orbit theory.
British James and Martin invented gas chromatography.
American L.E. ogle put forward the theory of harmonious field.
AD 1953
J.D. Watson of the United States and F.H.C Crick of the United Kingdom put forward the double helix structure model of DNA.
K Ziegler of the Federal Republic of Germany found that aluminum alkyl and titanium tetrachloride can catalyze ethylene polymerization at normal temperature and pressure.
AD 1953 ~ 1954
The Ziegler-Natta catalyst was invented by K. Ziegler of the Federal Republic of Germany and G. Natta of Italy.
AD 1954
Wittig et al. of the Federal Republic of Germany discovered Wittig reagent.
Synthesis of brucine by American R.B. Woodward
Italy's G. Natta Company produces isotactic polypropylene with Ziegler-Natta catalyst.
AD 1955
A. Jiao Suo, Thompson, Seeburg, etc. Holmium was artificially made in the United States.
F. Sanger of Britain determined the primary structure of insulin.
Polyimide produced by DuPont, USA.
Walsh of Australia invents atomic absorption spectrometry.
AD 1956
British Imperial Chemical Industry Company produces reactive dyes.
AD 1957
The crystal structure of myoglobin was determined by J.C. Chendru in England.
A Keller of England made polyethylene single crystal and put forward the folding theory of polymer chain.
AD 1958
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The Mossbauer spectrum was discovered by r·l· Mossbauer of the Federal Republic of Germany.
Cis-polyisoprene produced by Goodrich company in the United States.
AD 1950 ~ 1959
American R.B. Woodward, British R.Robinson, British J.W. Cornforth and American W.S. Johnson completed the total synthesis of cholesterol, cortisone, epiandrosterone and testosterone.
AD 1960
Chlorophyll synthesis by American R. B. Woodward
Radioimmunoassay was put forward by R.S. Yello and others in the United States.
P.B. Weiss uses molecular sieves as shape-selective catalysts. Hamilton separated amino acids by liquid chromatography.
A.D. 196 1 year
The atomic weight standard adopted by the International Union of Pure and Applied Chemistry is 12C = 12.
Technetium is manufactured by a. joso of America.
Polybenzimidazole manufactured by C.S. Marvell in the United States, etc.
AD 1962
Synthesis of Xenon Platinum Hexafluoride by Balet Company in Britain
The solid-phase synthesis of peptides was invented by American R.B. Merifield.
AD 1963
American R.G. Pearson put forward the theory of soft and hard acids and bases.
AD 1964
Element 104 is composed of гнннннннннннннннннннн.
AD 1965
R. B. Woodward and R. Hoffman of the United States put forward the conservation of molecular orbital symmetry.
China totally synthesized crystalline bovine insulin.
Polyphenylene ether produced by General Electric Company of the United States