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Elements Symbols, Oxidation States & Atomic Weight Technical FAQs
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Over a Century of Nobel Prize Winners in Chemistry  
   
Unit Conversions
     
To Convert Into Multiply By
     
Temperature    
ºF ºC 0.556ºC- 17.8
ºC ºF 1.8ºC + 32
ºC ºK 1.0ºC + 273
Length    
mils microns 25.4
mils millimeters 0.0254
inches mils 1000
inches centimeters 2.54
Mass    
ounces grams 28.4
pounds kilograms 0.45
grams ounces 0.03215
kilograms pounds 2.2
Liquid Volume    
ounces milliliters 30
pints liters 0.47
quarts liters 0.95
gallons liters 3.8
Milliliters ounces 0.034
liters pints 2.1
liters quarts 1.06
liters gallons 0.26
cubic feet cubic meters 0.03
cubic yards cubic meters 0.76
     
Periodic Table of Elements
 
 
 
Table of Elements Symbols, Oxidation States and Atomic Weights
Oxidation States (Bold indicates most stable state), -- = unknown, Atomic Mass based on the 12C=12
                 
Element Symbol Oxidation
States
Atomic
Weight
  Element Symbol Oxidation
States
Atomic
Weight
Actinium Ac 3 227.0278   Mendelevium Md 2,3 258.0986
Aluminum Al 3 26.981539   Mercury Hg 1,2 200.59
Americium Am 3,4,5,6 243.0614   Molybdenum Mo 2,3,4,5,6 95.94
Antimony Sb ±3,5 121.757   Neodymium Nd 3 144.24
Argon Ar   39.948   Neon Ne   20.1797
Arsenic As ±3,5 74.92159   Neptunium Np 3,4,5,6 237.0482
Astatine At ±1,3,5,7 209.9871   Nickel Ni 2,3 58.6934
Barium Ba 2 137.327   Niobium Nb 3,5 92.9064
Berkelium Bk 3,4 247.0703   Nitrogen N 2,±3,4,5 14.00674
Beryllium Be 2 9.012182   Nobelium No 2,3 259.1009
Bismuth Bi 3,5 208.98037   Osmium Os 2,3,4,6,8 190.23
Bohrium Bh -- 262.1229   Oxygen O -2 15.9994
Boron B 3 10.811   Palladium Pd 2,4 106.42
Bromine Br ±1,5 79.904   Phosphorus P ±3,4,5 30.973762
Cadmium Cd 2 112.411   Platinum Pt 2,4 195.08
Calcium Ca 2 40.078   Plutonium Pu 3,4,5,6 244.0642
Californium Cf 3 251.0796   Polonium Po 2,4 208.9871
Carbon C 2,±4 12.011   Potassium K 1 39.0983
Cerium Ce 3,4 140.115   Praseodymium Pr 3,4 140.9151
Cesium Cs 1 132.90543   Promethium Pm 3 146.9151
Chlorine Cl ±1,3,5,7 35.4527   Protactinium Pa 4,5 231.0359
Chromium Cr 2,3,6 51.9961   Radium Ra 2 226.0254
Cobalt Co 2,3 58.93320   Radon Rn   222.0176
Copper Cu 1,2 63.546   Rhenium Re -1,2,4,6,7 186.207
Curium Cm 3 247.0703   Rhodium Rh 2,3,4 102.9055
Dubnium Db -- 262.1138   Rubidium Rb 1 85.4678
Dysprosium Dy 3 162.50   Ruthenium Ru 2,3,4,6,8 101.07
Einsteinium Es 3 252.0829   Rutherfordium Rf 4 261.1087
Erbium Er 3 167.26   Samarium Sm 2,3 150.36
Europium Eu 2,3 151.96   Scandium Sc 3 44.95591
Fermium Fm 3 257.0951   Seaborgium Sg -- 263.1182
Fluorine F -1 18.9984032   Selenium Se -2,4,6 78.96
Francium Fr 1 223.0197   Silicon Si 4 28.0855
Gadolinium Gd 3 157.25   Silver Ag 1 107.8682
Gallium Ga 3 69.723   Sodium Na 1 22.989768
Germanium Ge 4 72.61   Strontium Sr 2 87.62
Gold Au 1,3 196.96654   Sulfur S ±2,4,6 32.066
Hafnium Hf 4 178.49   Tantalum Ta 5 180.9479
Hassium Hs -- 265   Technetium Tc 7 98
Helium He   4.002602   Tellurium Te -2,4,6 127.6
Holmium Ho 3 164.93032   Terbium Tb 3,4 158.92534
Hydrogen H 1 1.00794   Thallium Tl 1,3 204.3833
Indium In 3 114.818   Thorium Th 4 232.0381
Iodine I ±1,5,7 126.9045   Thulium Tm 2,3 168.9342
Iridium Ir 2,3,4,6 192.22   Tin Sn 2,4 118.710
Iron Fe 2,3 55.847   Titanium Ti 3,4 47.88
Krypton Kr   83.80   Tungsten W 2,3,4,5,6 183.84
Lanthanum La 3 138.9055   Uranium U 3,4,5,6 238.0289
Lawrencium Lr 3 262.11   Vanadium V 2,3,4,5 50.9415
Lead Pb 2,4 207.2   Xenon Xe   131.29
Lithium Li 1 6.941   Ytterbium Yb 2,3 173.04
Lutetium Lu 3 174.967   Yttrium Y 3 88.90585
Magnesium Mg 2 24.3050   Zinc Zn 2 65.38
Manganese Mn 2,3,4,6,7 54.93805   Zirconium Zr 4 91.224
Meitnerium Mt -- 266          
                 
Abbreviations
       
AA Atomic Absorption GR Guaranteed Reagent
ACS American Chemical Society HPLC High-Performance Liquid Chromatography
ANSI American National Standards Institute ICP Inductively Coupled Plasma
AOAC Association of Official Analytical Chemists IR Infrared
APHA American Public Health Association KF Karl Fischer
ASTM American Society for Testing Materials meq Milliequivalent
BSI British Standards Institute NF National Formulary
CAS Chemical Abstracts Service NIST National Institute of Standards and Technology
CI Color Index OSHA Occupational Safety and Health Administration
EPA U.S. Environmental Protection Agency TLC Thin Layer Chromatography
GC Gas Chromatography USDA U.S. Department of Agriculture
GLC Gas Liquid Chromatography USP U.S. Pharmacopoeia
       
       
Over a Century of Nobel Prize Winners in Chemistry
 
1901 Jacoubs Henricus Van’t Hoff - laws of chemical dynamics and osmotic pressure in solutions
1902 Hermann Emil Fischer - sugar and purine synthesis
1903 Svante August Arrhenius - electrolytic theory of dissociation
1904 Sir William Ramsay - inert gaseous elements in air and their placement in the periodic system
1905 Johann Friedrich Wilhelm Adolf Von Baeyer - organic dyes and hydroaromatic compounds
1906 Henri Moissan - isolation of fluorine, electric furnace
1907 Eduard Buchner - biochemical research cellfree fermentation
1908 Lord Ernst Rutherford - disintegration of elements and chemistry of radioactive substances
1909 Wilhelm Ostwald - catalysis and principles governing chemical equilibria and rates of reaction
1910 Otto Wallach - alicyclic compounds
1911 Marie Curie - radium and polonium
1912 Victor Grignard - Grignard reagent
  Paul Sabatier - hydrogenating organic compounds in the presence of finely disintegrated metals
1913 Alfred Werner - linkage of atoms in molecules
1914 Theodore William Richards - determination of the atomic weight on many chemical elements
1915 Richard Martin Wilstatter - plant pigments - chlorophyll
1916-1917 No prize awarded
1918 Fritz Harber - synthesis of ammonia
1919 No prize awarded
1920 Walther Hermann Nernst - thermochemistry
1921 Frederick Soddy - radioactive substances and the origin and nature of isotopes
1922 Francis William Aston - isotopes in non-radioactive elements and enunciation of the whole number rule
1923 Fritz Pregl - micro-analysis of organic substances
1924 No prize awarded
1925 Richard Adolf Zsigmondy - colloid solutions
1926 Theodor Svedberg - disperse systems
1927 Heinrich Otto Wieland - Bile acids and related substances
1928 Adolf Otto Reinhold Windaus - constitution of sterols and their connection with vitamins
1929 Sir Arthur Harden & Hans Karl August Simon Von Euler-Chelpin - fermentation of sugar and fermentative enzymes
1930 Hans Fischer - constitution of haemin and chlorophyll and synthesis of haemin
1931 Carl Bosch & Friedrich Bergius - chemical high pressure methods
1932 Irving Langmuir - surface chemistry
1933 No prize awarded
1934 Harold Clayton Urey - heavy hydrogen
1935 Frederic Joliot & Irene Joliot-Curie - radioactive elements
1936 Petrus Josephus Wilhelmus Debye - Molecular structure on dipole moments and the diffraction of X-rays and electrons in gases
1937 Sir Walter Norman Haworth - carbohydrates and vitamin C
  Paul Karrer - carotenoids, flavins and vitamins A and B2
1938 Richard Kuhn - carotenoids and vitamins
1939 Adolf Friedrich Johann Butenandt - sex hormones
  Leopold Ruzicka - Polymethylenes and higher terpenes
1940-1942 No prize awaded
1943 George De Hevesy - isotopes as tracers
1944 Otto Hahn - fission of heavy nuclei
1945 Artturi Ilmari Virtanen - fodder preservation method
1946 James Batcheller Sumner - enzyme crystallization
  John Howard Northrop & Wendell Merdith Stanley - enzymes and virus proteins in a pure form
1947 Sir Robert Robinson - alkaloids
1948 Arne Wilhelm Kaurin Tiselius - electrophoresis and absorption analysis - nature of serum proteins
1949 William Francis Giauque - chemical thermodynamics - behaviour of substances at extremely low temperatures
1950 Otto Paul Hermann Diels & Kurt Alder - diene synthesis
1951 Edwin Mattison Mc Millan & Glenn Theodore Seaborg - chemistry of the transuranium elements
1952 Archer John Porter Martin & Richard Laurence Millington Synge - partition chromatography
1953 Hermann Staudinger - macromolecular chemistry
1954 Linus Carl Pauling - chemical bond application to elucidation of the structure of complex substances
1955 Vincent Du Vigneaud - sulphur compounds - synthesis of a polypeptide hormone
1956 Sir Cyril Norman Hinshelwood & Nikolay Nikolaevich Semenov - mechanism of chemical reactions
1957 Lord Alexander R. Todd - nucleotides and nucleotide co-enzymes
1958 Frederick Sanger - structure of proteins - insulin
1959 Jaroslav Heyrovsky - polarographic methods of analysis
1960 Willard Frank Libby - carbon-14 for age determination
1961 Melvin Calvin - carbon dioxide assimilation in plants
1962 Max Ferdinand Perutz & Sir John Cowdery Kendrew - Globular proteins
1963 Karl Ziegler & Giulio Natta - high polymers
1964 Dorothy Crowfood Hodgkin - X-ray techniques of the structures of biochemical substances
1965 Robert Burns Woodward - achievements in organic synthesis
1966 Robert S. Mulliken - chemical bonds and the electronic structure of molecules by the molecular orbital method
1967 Manfred Eigen, Ronald George Wreyford Norrish & Lord George Porter - extremely fast chemical reactions effected by disturbing the equlibrium by very short pulses of energy
1968 Lars Onsager - reciprocal relations - thermodynamics of irreversible processes
1969 Sir Derek H. R. Barton & Odd Hassel - conformation applications in chemistry
1970 Luis F. Leloir - sugar nucleotides and their role in biosynthesis of carbohydrates
1971 Gerhard Herzberg - electronic stucture and geometry of molecules
1972 Christian B. Anfinsen - ribonuclease - amino acid sequence and the biologically active confirmation Stanford Moore & William H. Stein - chemical structure and catalytic activity of the active centre of the ribonuclease molecule
1973 Ernst Otto Fischer & Sir Geoffrey Wilkinson - Organometallic sandwich compounds
1974 Paul J. Flory - physical chemistry of the macromolecules
1975 Sir John Warcup Cornforth - enzyme-catalyzed reactions
  Vladimir Prelog - organic molecules and reactions
1976 William N. Lipscomb - structure of boranes
1977 Ilya Prigogine - non-equilibrium thermodynamics theory of dissipative structures
1978 Peter D. Mitchell - Biological energy transfer through the chemiosmotic theory
1979 Herbert C. Brown & Georg Wittig - boron and phosphorus containing compounds as reagents in organic synthesis
1980 Paul Berg - biochemistry of nucleic acids to recombinant - DNA
  Walter Gilbert & Frederick Sanger - determination of base sequences in nucleic acids
1981 Kenichi Fukui & RonaldHoffmann - theories of chemical reactions
1982 Sir Aaron Klug - crystallographic electron microscopy and structural elucidation of biologically important nuclei acid-protein complexes
1983 Henry Taube - electron transfer reaction
1984 Robert Bruce Merrifield - chemical synthesis on a solid matrix
1985 Herbert A. Hauptman & Jerome Karle - direct methods for the determination of crystal structures
1986 Dudley R. Herschbach, Yuan T. Lee & John C. Polanyi - dynamics of chemical elementary processes
1987 Donald J. Cram, Jean-Marie Lehn & Charles J. Pedersen - Molecules with structure-specific interactions of high selectivity
1988 Johann Deisenhofer, Robert Huber, & Hartmut Michel - three dimensional structure of a photosynthetic reaction centre
1989 Sidney Altman & Thomas R Cech - catalytic properties of RNA
1990 Elias James Corey - theory and methodology of organic synthesis
1991 Richard R Ernst - high resolution nuclear magnetic resonance spectroscopy
1992 Rudolph A. Marcus - theory of electron transfer reactions in chemical systems
1993 Kary B Mullis - polymerase chain reaction method
  Michael Smith - oligonucleiotide-based site directed mutagenesis
1994 George A. Olah - contribution to carbocation chemistry
1995 Paul Crutzen, Mario Molina, & F. Sherwood Rowland - formation and decomposition of ozone
1996 Robert F. Curl Jr., Sir Harold W. Kroto, & Richard E Smalley - discovery of fullerenes
1997 Paul D. Boyer & John E. Walker - elucidiation of the enzymatic mechanism underlying the synthesis of adenosine triphosphate
  Jens C. Skou - discovery of an ion-transporting enzyme
1998 Walter Kohn - density-functional theory
  John A. Pople - computational methods in quantum chemistry
1999 Ahmed Zewail - chemistry by using rapid-fire laser flashes that illuminate the motion of atoms in a molecule
2000 Alan J. Heeger, Alan G. MacDiarmin, and Hideke Shirakawa - discovery and development of conductive polymers
2001 William S. Knowles, and Ryoji Noyori - chirally catalysed hydrogenation reactions and K. Barry Sharpless - chirally catalysed oxidation reactions.
2002 John B. Fenn and Koichi Tanaka - development of soft desorption ionisation methods for mass spectrometric analyses of biological macromolecules and Kurt Wüthrich - development of nuclear magnetic resonance spectroscopy for determining the three-dimensional structure of biological macromolecules in solution
2003 Peter Agre - discovery of water channels and Roderick MacKinnon - structural and mechanistic studies of ion channels
2004

Aaron Ciechanover, Avram Hershko, and Irwin Rose for the discovery of ubiquitin-mediated protein degradation

2005

Yves Chauvin, Robert H. Grubbs, and Richard R. Schrock for the development of the metathesis method in organic synthesis.

2006

Roger D. Kornberg for his studies of the molecular basis of eukaryotic transcription.

2007

Gerhard Ertl for his studies of chemical processes on solid surfaces.

2008

Osamu Shimomura, Martin Chalfie, and Roger Y. Tsien for the discovery and development of the green fluorescent protein, GFP.

   




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