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List of elements by symbol

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Contents
This is a list of chemical elements by symbol, including the current symbols used to identify the chemical elements as recognized by the International Union of Pure and Applied Chemistry, as well as proposed and historical symbols. Also given is each element's atomic number, atomic mass or most stable isotope, group and period numbers on the periodic table, and origin of the symbol if not obvious from the current name of the element.

Current symbols

Symbol Name Origin of Symbol Atomic Number Atomic Mass Group Period

Ac Actinium   89   7
Ag Silver Latin Argentum 47 11 5
Al Aluminium (Aluminum)   13 26.9815386(8) 13 3
Am Americium   95   7
Ar Argon   18 4 18 3
As Arsenic   33 74.92160(2) 15 4
At Astatine   85 17 6
Au Gold Latin Aurum 79 196.966569(4) 11 6
B Boron   5 3 4 13 2
Ba Barium   56 137.327(7) 2 6
Be Beryllium   4 9.012182(3) 2 2
Bh Bohrium   107 7 7
Bi Bismuth   83 208.98040(1) 15 6
Bk Berkelium   97   7
Br Bromine   35 79.904(1) 17 4
C Carbon   6 4 14 2
Ca Calcium   20 2 4
Cd Cadmium   48 12 5
Ce Cerium   58   6
Cf Californium   98   7
Cl Chlorine   17 3 4 17 3
Cm Curium   96   7
Co Cobalt   27 58.933195(5) 9 4
Cr Chromium   24 51.9961(6) 6 4
Cs Caesium (Cesium)   55 132.9054519(2) 1 6
Cu Copper Latin Cuprum 29 11 4
Db Dubnium   105 5 7
Ds Darmstadtium   110 10 7
Dy Dysprosium   66   6
Er Erbium   68   6
Es Einsteinium   99   7
Eu Europium   63   6
F Fluorine   9 18.9984032(5) 17 2
Fe Iron Latin Ferrum 26 55.845(2) 8 4
Fm Fermium   100   7
Fr Francium   87 1 7
Ga Gallium   31 69.723(1) 13 4
Gd Gadolinium   64   6
Ge Germanium   32 72.64(1) 14 4
H Hydrogen   1 3 4 1 1
He Helium   2 4 18 1
Hf Hafnium   72 178.49(2) 4 6
Hg Mercury Latin Hydrargyrum 80 200.59(2) 12 6
Ho Holmium   67 164.930 32(2)   6
Hs Hassium   108 8 7
I Iodine   53 126.904 47(3) 17 5
In Indium   49 114.818(3) 13 5
Ir Iridium   77 192.217(3) 9 6
K Potassium (Kalium) Latin Kalium 19 39.0983(1) 1 4
Kr Krypton   36 3 18 4
La Lanthanum   57   6
Li Lithium   3 3 4 5 1 2
Lr Lawrencium   103 3 7
Lu Lutetium   71 3 6
Md Mendelevium   101   7
Mg Magnesium   12 24.3050(6) 2 3
Mn Manganese   25 54.938045(5) 7 4
Mo Molybdenum   42 6 5
Mt Meitnerium   109 9 7
N Nitrogen   7 4 15 2
Na Sodium Latin Natrium 11 22.98976928(2) 1 3
Nb Niobium   41 92.906 38(2) 5 5
Nd Neodymium   60   6
Ne Neon   10 3 18 2
Ni Nickel   28 58.6934(2) 10 4
No Nobelium   102   7
Np Neptunium   93   7
O Oxygen   8 4 16 2
Os Osmium   76 8 6
P Phosphorus   15 30.973762(2) 15 3
Pa Protactinium   91   7
Pb Lead Latin Plumbum 82 4 14 6
Pd Palladium   46 10 5
Pm Promethium   61   6
Po Polonium   84 16 6
Pr Praseodymium   59 140.90765(2)   6
Pt Platinum   78 195.084(9) 10 6
Pu Plutonium   94   7
Ra Radium   88 2 7
Rb Rubidium   37 1 5
Re Rhenium   75 186.207(1) 7 6
Rf Rutherfordium   104 4 7
Rg Roentgenium   111 11 7
Rh Rhodium   45 102.905 50(2) 9 5
Rn Radon   86 18 6
Ru Ruthenium   44 8 5
S Sulfur   16 4 16 3
Sb Antimony Latin Stibium 51 15 5
Sc Scandium   21 44.955912(6) 3 4
Se Selenium   34 16 4
Sg Seaborgium   106 6 7
Si Silicon Latin Silicium 14 14 3
Sm Samarium   62   6
Sn Tin Latin Stannum 50 14 5
Sr Strontium   38 4 2 5
Ta Tantalum   73 180.94788(2) 5 6
Tb Terbium   65 158.92535(2)   6
Tc Technetium   43 7 5
Te Tellurium   52 16 5
Th Thorium   90 2   7
Ti Titanium   22 47.867(1) 4 4
Tl Thallium   81 204.3833(2) 13 6
Tm Thulium   69 168.93421(2)   6
U Uranium   92 2 3   7
Uub Ununbium   112 12 7
Uuh Ununhexium   116 16 7
Uup Ununpentium   115 15 7
Uuq Ununquadium   114 14 7
Uut Ununtrium   113 13 7
V Vanadium   23 50.9415(1) 5 4
W Tungsten German Wolfram 74 183.84(1) 6 6
Xe Xenon   54 3 18 5
Y Yttrium   39 88.90585(2) 3 5
Yb Ytterbium   70   6
Zn Zinc   30 65.409(4) 12 4
Zr Zirconium   40 4 5

Symbols not currently used

Chemical Symbol Name Atomic Number Source Why Not Used
A Argon 18 Current symbol is Ar.
Ab Alabamine 85 Discredited claim to discovery of astatine.
Am Alabamium 85 Discredited claim to discovery of astatine.
An Actinon 86 Name given at one time to an isotope of radon identified in the decay chain of actinium.
An Athenium 99 Proposed name for einsteinium.
Ao Ausonium 93 Discredited claim to discovery of neptunium.
Az Azote 7 Former name for nitrogen.
Bv Brevium 91 Former name for protactinium.
Bz Berzelium 59 Suggested name for praseodymium.
Cb Columbium 41 Former name of niobium.
Cb Columbium 95 Suggested name for americium.
Cp Cassiopeium 71 Former name for lutetium.
Ct Centurium 100 Proposed name for fermium.
Ct Celtium 72 Former name of hafnium.
Da Danubium 43 Suggested name for technetium.
Db Dubnium 104 Proposed name for rutherfordium. The symbol and name were used for element 105.
Di Didymium
Rare earth metal that proved to be a mixture of the elements praseodymium and neodymium.
Dp Decipium
Rare earth metal that proved to be a mixture primarily of samarium, neodymium and praseodymium.
Eb Ekaboron 21 Name given by Mendeleev to an as of then undiscovered element. When discovered, scandium closely matched the prediction.
El Ekaaluminium 31 Name given by Mendeleev to an as of then undiscovered element. When discovered, gallium closely matched the prediction.
Em Ekamangan 43 Name given by Mendeleev to an as of then undiscovered element. When discovered, technetium closely matched the prediction.
Es Ekasilicon 32 Name given by Mendeleev to an as of then undiscovered element. When discovered, germanium closely matched the prediction.
Es Esperium 94 Discredited claim to discovery of plutonium.
Fa Francium 87 Current symbol is Fr.
Fr Florentium 61 Discredited claim to discovery of promethium.
Gl Glucinium 4 Former name of beryllium.
Ha Hahnium 105 Proposed name for dubnium.
Ha Hahnium 108 Proposed name for hassium.
Il Illinium 61 Discredited claim to discovery of promethium.
Io Ionium 90 Name given at one time to an isotope of thorium identified in the decay chain of uranium.
J Iodine 53 In some languages, the name for iodine begins with J instead of I.
Jg Jargonium 72 Discredited claim to discovery of hafnium.
Jo Joliotium 105 Proposed name for dubnium.
Ku Kurchatovium 104 Proposed name for rutherfordium.
Lw Lawrencium 103 Current symbol is Lr.
M Muriaticum 17 Former name of chlorine.
Ma Masurium 43 Disputed claim to discovery of technetium.
Md Mendelevium 97 Proposed name for berkelium. The symbol and name were later used for element 101.
Me Mendelevium 64 Suggested name for erbium.
Ms Masrium 49 Discredited claim of discovery of a new element.
Mt Meitnium 91 Suggested name for protactinium.
Mv Mendelevium 101 Current symbol is Md.
Ng Norwegium 72 Discredited claim to discovery of hafnium.
Ni Niton 86 Former name for radon.
No Norium 72 Discredited claim to discovery of hafnium.
Ns Nielsbohrium 105 Proposed name for dubnium.
Ns Nielsbohrium 107 Proposed name for bohrium.
Nt Niton 86 Suggested name for radon.
Nw Newtonian 67 Suggested name for holmium.
Ny Neoytterbium 70 Former name of ytterbium.
Od Odinium 62 Suggested name for samarium.
Pc Policium 110 Proposed name for darmstadtium.
Pe Pelopium 41 Former name for niobium.
Po Potassium 19 Current symbol is K.
Pp Philippium
Rare earth metal that proved to be a mixture of other elements.
Rf Rutherfordium 106 Proposed name for seaborgium. The symbol and name were instead used for element 104.
Sa Samarium 62 Current symbol is Sm.
So Sodium 11 Current symbol is Na.
Sp Spectrium 70 Proposed name for ytterbium.
St Antimony 51 Current symbol is Sb.
Tn Thoron 86 Name given at one time to an isotope of radon identified in the decay chain of thorium.
Tn Tungsten 74 Current symbol is W.
Tu Thulium 69 Current symbol is Tm.
Tu Tungsten 74 Current symbol is W.
Ty Tyrium 60 Proposed name for neodymium.
Unb Unnilbium 102 Temporary name given to nobelium until the permanent name was chosen.
Une Unnilennium 109 Temporary name given to meitnerium until the permanent name was chosen.
Unh Unnilhexium 106 Temporary name given to seaborgium until the permanent name was chosen.
Uno Unniloctium 108 Temporary name given to hassium until the permanent name was chosen.
Unp Unnilpentium 105 Temporary name given to dubnium until the permanent name was chosen.
Unq Unnilquadium 104 Temporary name given to rutherfordium until the permanent name was chosen.
Uns Unnilseptium 107 Temporary name given to bohrium until the permanent name was chosen.
Unt Unniltrium 103 Temporary name given to lawrencium until the permanent name was chosen.
Unu Unnilunium 101 Temporary name given to mendelevium until the permanent name was chosen.
Uun Ununnilium 110 Temporary name given to darmstadtium until the permanent name was chosen.
Uuu Unununium 111 Temporary name given to roentgenium until the permanent name was chosen.
Vi Virginium 87 Discredited claim to discovery of francium.
Vm Virginium 87 Discredited claim to discovery of francium.
Yt Yttrium 39 Current symbol is Y.

The meaning of symbols in Why Not Used
A: The symbol was a standard one before, but withdrawn.
D: The name/symbol was created by discredited claim.
J: The symbol was a unofficial alternative one.
M: The name/symbol was a former (proposed) one, and did not become a standard one ever.
Q: The name/symbol was a suggested one, and was not become a candidate one.
R: The name/symbol was a proposed candidate one, but either not adopted or then belonged to another element.
T: The name/symbol was a isotope's one.

Other symbols that look like element symbols

Notes

References

External links

Periodic tables
Standard table | Vertical table | Table with names | Names and atomic masses (large) | Names and atomic masses (small) | Names and atomic masses (text only) | Inline F-block | Elements to 218 | Electron configurations | Metals and nonmetals | Table by blocks
Lists of elements
Name | Atomic symbol | Atomic number | Boiling point | Melting point | Density | Atomic mass
Groups:   1 -  2 -  3 -  4 -  5 -  6 -  7 -  8 -  9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18
Periods:  1  -  2  -  3  -  4  -  5  -  6  -  7  -  8  -  9
Series:   Alkalis  -  Alkaline earths  -  Lanthanides  -  Actinides  -  Transition metals  -  Poor metals  -  Metalloids  -  Nonmetals  -  Halogens  -  Noble gases
Blocks:  s-block  -  p-block  -  d-block  -  f-block  -  g-block

 

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