List of elements by symbol

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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.

Chemical series of the periodic table
Alkali metals Alkaline earth metals Lanthanides Actinides Transition metals
Poor metals Metalloids Nonmetals Halogens Noble gases

[edit] Current symbols

Symbol Name Origin of Symbol Atomic Number Atomic Mass Group Period
AcActiniumGreek aktinos89[227]<ref name="fn_1">The element does not have any stable nuclides, and a value in brackets, e.g. [209], indicates the mass number of the longest-lived isotope of the element. However, three elements, Thorium, Protactinium, and Uranium, have a characteristic terrestrial isotopic composition, and thus their atomic mass given.</ref> 7
AgSilverLatin argentum47107.8682(2)<ref name="fn_2">The isotopic composition of this element varies in some geological specimens, and the variation may exceed the uncertainty stated in the table.</ref>115
AlAluminium (Aluminum)alumen1326.9815386(8)133
AmAmericiumthe Americas95[243]<ref name="fn_1" /> 7
ArArgonGreek argon1839.948(1)<ref name="fn_2" /> <ref name="fn_4">The isotopic composition varies in terrestrial material such that a more precise atomic weight can not be given.</ref>183
AsArsenicGreek arsenikos3374.92160(2)154
AtAstatineGreek astatos85[210]<ref name="fn_1" />176
AuGoldLatin aurum79196.966569(4)116
BBoronborax and carbon510.811(7)<ref name="fn_2" /> <ref name="fn_3">The isotopic composition of the element can vary in commercial materials, which can cause the atomic weight to deviate significantly from the given value.</ref> <ref name="fn_4" />132
BaBariumGreek barys56137.327(7)26
BeBerylliumberyl49.012182(3)22
BhBohriumNiels Bohr107[264]<ref name="fn_1" />77
BiBismuthcorruption of the German wissmuth83208.98040(1)156
BkBerkeliumBerkeley, California97[247]<ref name="fn_1" /> 7
BrBromineGreek bromos3579.904(1)174
CCarboncarbo612.0107(8)<ref name="fn_2" /> <ref name="fn_4" />142
CaCalciumcalx2040.078(4)<ref name="fn_2" />24
CdCadmiumGreek kadmia48112.411(8)<ref name="fn_2" />125
CeCeriumCeres58140.116(1)<ref name="fn_2" /> 6
CfCaliforniumState and University of California98[251]<ref name="fn_1" /> 7
ClChlorineGreek chloros1735.453(2)<ref name="fn_2" /> <ref name="fn_3" /> <ref name="fn_4" />173
CmCuriumPierre and Marie Curie96[247]<ref name="fn_1" /> 7
CoCobaltkobold2758.933195(5)94
CrChromiumGreek chroma2451.9961(6)64
CsCaesium (Cesium)Latin caesius55132.9054519(2)16
CuCopperLatin Cuprum2963.546(3)<ref name="fn_4" />114
DbDubniumDubna, Russia105[262]<ref name="fn_1" />57
DsDarmstadtiumDarmstadt, Germany110[271]<ref name="fn_1" />107
DyDysprosiumGreek dysprositos66162.500(1)<ref name="fn_2" /> 6
ErErbiumYtterby, Sweden68167.259(3)<ref name="fn_2" /> 6
EsEinsteiniumAlbert Einstein99[252]<ref name="fn_1" /> 7
EuEuropiumEurope63151.964(1)<ref name="fn_2" /> 6
FFluorineLatin fluo918.9984032(5)172
FeIronLatin ferrum2655.845(2)84
FmFermiumEnrico Fermi100[257]<ref name="fn_1" /> 7
FrFranciumFrance87[223]<ref name="fn_1" />17
GaGalliumLatin Gallia3169.723(1)134
GdGadoliniumgadolinite64157.25(3)<ref name="fn_2" /> 6
GeGermaniumGermany3272.64(1)144
HHydrogenGreek hydror and gen11.00794(7)<ref name="fn_2" /> <ref name="fn_3" /> <ref name="fn_4" />11
HeHeliumGreek helios24.002602(2)<ref name="fn_2" /> <ref name="fn_4" />181
HfHafniumLatin Hafnia72178.49(2)46
HgMercuryLatin hydrargyrum80200.59(2)126
HoHolmiumLatin Holmia67164.930 32(2) 6
HsHassiumHesse, Germany108[277]<ref name="fn_1" />87
IIodineGreek ioeides53126.904 47(3)175
InIndiumindigo blue49114.818(3)135
IrIridiumGreek iris77192.217(3)96
KPotassium (Kalium)Latin kalium1939.0983(1)14
KrKryptonGreek kryptos3683.798(2)<ref name="fn_2" /> <ref name="fn_3" />184
LaLanthanumlanthanien57138.90547(7)<ref name="fn_2" /> 6
LiLithiumGreek lithos36.941(2)<ref name="fn_2" /> <ref name="fn_3" /> <ref name="fn_4" /> <ref>The atomic weight of commercial Lithium can vary between 6.939 and 6.996—analysis of the specific material is necessary to find a more accurate value.</ref>12
LrLawrenciumErnest O. Lawrence103[262]<ref name="fn_1" />37
LuLutetiumLatin Lutetia71174.967(1)<ref name="fn_2" />36
MdMendeleviumDmitri Mendeleyev101[258]<ref name="fn_1" /> 7
MgMagnesiumMagnesia, Greece1224.3050(6)23
MnManganeseLatin magnes2554.938045(5)74
MoMolybdenumGreek molybdos4295.94(2)<ref name="fn_2" />65
MtMeitneriumLise Meitner109[268]<ref name="fn_1" />97
NNitrogenGreek nitron and gen714.0067(2)<ref name="fn_2" /> <ref name="fn_4" />152
NaSodiumLatin natrium1122.98976928(2)13
NbNiobiumNiobe4192.906 38(2)55
NdNeodymiumGreek neos didymos60144.242(3)<ref name="fn_2" /> 6
NeNeonGreek neos1020.1797(6)<ref name="fn_2" /> <ref name="fn_3" />182
NiNickelGerman kupfernickel2858.6934(2)104
NoNobeliumAlfred Nobel102[259]<ref name="fn_1" /> 7
NpNeptuniumNeptune93[237]<ref name="fn_1" /> 7
OOxygenGreek oxys and gen815.9994(3)<ref name="fn_2" /> <ref name="fn_4" />162
OsOsmiumosme76190.23(3)<ref name="fn_2" />86
PPhosphorusGreek phosphoros1530.973762(2)153
PaProtactiniumGreek protos and actinium91231.03588(2)<ref name="fn_1" /> 7
PbLeadLatin plumbum82207.2(1)<ref name="fn_2" /> <ref name="fn_4" />146
PdPalladiumPallas46106.42(1)<ref name="fn_2" />105
PmPromethiumPrometheus61[145]<ref name="fn_1" /> 6
PoPoloniumPoland84[210]<ref name="fn_1" />166
PrPraseodymiumGreek prasios didymos59140.90765(2) 6
PtPlatinumGreek platina78195.084(9)106
PuPlutoniumPluto94[244]<ref name="fn_1" /> 7
RaRadiumGreek radius88[226]<ref name="fn_1" />27
RbRubidiumLatin rubidus3785.4678(3)<ref name="fn_2" />15
ReRheniumRhine Province75186.207(1)76
RfRutherfordiumErnest Rutherford104261<ref name="fn_1" />47
RgRoentgeniumWilhelm Conrad Röntgen111[272]<ref name="fn_1" />117
RhRhodiumGreek rhodon45102.905 50(2)95
RnRadonradium and emanation86[220]<ref name="fn_1" />186
RuRutheniumLatin Ruthenia44101.07(2)<ref name="fn_2" />85
SSulfur (Sulphur)sulfur1632.065(5)<ref name="fn_2" /> <ref name="fn_4" />163
SbAntimonyLatin stibium51121.760(1)<ref name="fn_2" />155
ScScandiumScandinavia2144.955912(6)34
SeSeleniumGreek selene3478.96(3)<ref name="fn_4" />164
SgSeaborgiumGlenn T. Seaborg106[266]<ref name="fn_1" />67
SiSiliconLatin silex1428.0855(3)<ref name="fn_4" />143
SmSamariumsamarskite62150.36(2)<ref name="fn_2" /> 6
SnTinLatin stannum50118.710(7)<ref name="fn_2" />145
SrStrontiumLatin Strontian3887.62(1)<ref name="fn_2" /> <ref name="fn_4" />25
TaTantalumKing Tantalus73180.94788(2)56
TbTerbiumYtterby, Sweden65158.92535(2) 6
TcTechnetiumGreek technetos43[98]<ref name="fn_1" />75
TeTelluriumGreek tellus52127.60(3)<ref name="fn_2" />165
ThThoriumThor90232.03806(2)<ref name="fn_1" /> <ref name="fn_2" /> 7
TiTitaniumthe Titans2247.867(1)44
TlThalliumGreek thallos81204.3833(2)136
TmThuliumThule69168.93421(2) 6
UUraniumUranus92238.02891(3)<ref name="fn_1" /> <ref name="fn_2" /> <ref name="fn_3" /> 7
UubUnunbiumLatin uni and bi112[285]<ref name="fn_1" />127
UuhUnunhexiumLatin uni and Greek hex116[292]<ref name="fn_1" />167
UuoUnunoctiumLatin uni and oct118[294]<ref name="fn_1" />187
UupUnunpentiumLatin uni and Greek pent115[288]<ref name="fn_1" />157
UuqUnunquadiumLatin uni and quadr114[289]<ref name="fn_1" />147
UutUnuntriumLatin uni and Greek tri113[284]<ref name="fn_1" />137
VVanadiumVanadis2350.9415(1)54
WTungstenGerman wolfram74183.84(1)66
XeXenonGreek xenos54131.293(6)<ref name="fn_2" /> <ref name="fn_3" />185
YYttriumYtterby, Sweden3988.90585(2)35
YbYtterbiumYtterby, Sweden70173.04(3)<ref name="fn_2" /> 6
ZnZincGerman zin3065.409(4)124
ZrZirconiumzircon4091.224(2)<ref name="fn_2" />45
Chemical series of the periodic table
Alkali metals Alkaline earth metals Lanthanides Actinides Transition metals
Poor metals Metalloids Nonmetals Halogens Noble gases

[edit] Symbols not currently used

Chemical SymbolNameAtomic NumberSourceWhy Not Used
AArgon18Current symbol is Ar. <ref name="why_not_used">The name/symbol was an isotope's one.
</ref>
AbAlabamine85Discredited claim to discovery of astatine. <ref name="why_not_used" />
AmAlabamium85Discredited claim to discovery of astatine. <ref name="why_not_used" />
AnActinon86Name given at one time to an isotope of radon identified in the decay chain of actinium. <ref name="why_not_used" />
AnAthenium99Proposed name for einsteinium. <ref name="why_not_used" />
AoAusonium93Discredited claim to discovery of neptunium. <ref name="why_not_used" />
AzAzote7Former name for nitrogen. <ref name="why_not_used" />
BvBrevium91Former name for protactinium. <ref name="why_not_used" />
BzBerzelium59Suggested name for praseodymium. <ref name="why_not_used" />
CbColumbium41Former name of niobium. <ref name="why_not_used" />
CbColumbium95Suggested name for americium. <ref name="why_not_used" />
CpCassiopeium71Former name for lutetium. <ref name="why_not_used" />
CtCenturium100Proposed name for fermium. <ref name="why_not_used" />
CtCeltium72Former name of hafnium. <ref name="why_not_used" />
DaDanubium43Suggested name for technetium. <ref name="why_not_used" />
DbDubnium104Proposed name for rutherfordium. The symbol and name were used for element 105. <ref name="why_not_used" />
DiDidymium-Rare earth metal that proved to be a mixture of the elements praseodymium and neodymium. <ref name="why_not_used" />
DpDecipium-Rare earth metal that proved to be a mixture of the elements samarium, neodymium and praseodymium. <ref name="why_not_used" />
EbEkaboron21Name given by Mendeleev to an as of then undiscovered element. When discovered, scandium closely matched the prediction. <ref name="why_not_used" />
ElEkaaluminium31Name given by Mendeleev to an as of then undiscovered element. When discovered, gallium closely matched the prediction. <ref name="why_not_used" />
EmEmanation86Also called radium emanation, the name was originally given by Friedrich Ernst Dorn in 1900. In 1923, this element officially became radon (the name given at one time to 222Rn, an isotope identified in the decay chain of radium). <ref name="why_not_used" />
EmEkamangan43Name given by Mendeleev to an as of then undiscovered element. When discovered, technetium closely matched the prediction. <ref name="why_not_used" />
EsEkasilicon32Name given by Mendeleev to an as of then undiscovered element. When discovered, germanium closely matched the prediction. <ref name="why_not_used" />
EsEsperium94Discredited claim to discovery of plutonium. <ref name="why_not_used" />
FaFrancium87Current symbol is Fr. <ref name="why_not_used" />
FrFlorentium61Discredited claim to discovery of promethium. <ref name="why_not_used" />
GlGlucinium4Former name of beryllium. <ref name="why_not_used" />
HaHahnium105Proposed name for dubnium. <ref name="why_not_used" />
HaHahnium108Proposed name for hassium. <ref name="why_not_used" />
IlIllinium61Discredited claim to discovery of promethium. <ref name="why_not_used" />
IoIonium90Name given at one time to an isotope of thorium identified in the decay chain of uranium. <ref name="why_not_used" />
JIodine53In some languages, the name for iodine begins with J instead of I. <ref name="why_not_used" />
JgJargonium72Discredited claim to discovery of hafnium. <ref name="why_not_used" />
JoJoliotium105Proposed name for dubnium. <ref name="why_not_used" />
KuKurchatovium104Proposed name for rutherfordium. <ref name="why_not_used" />
LwLawrencium103Current symbol is Lr. <ref name="why_not_used" />
MMuriaticum17Former name of chlorine. <ref name="why_not_used" />
MaMasurium43Disputed claim to discovery of technetium. <ref name="why_not_used" />
MdMendelevium97Proposed name for berkelium. The symbol and name were later used for element 101. <ref name="why_not_used" />
MeMendelevium68Suggested name for erbium. <ref name="why_not_used" />
MsMasrium49Discredited claim of discovery of indium. <ref name="why_not_used" />
MtMeitnium91Suggested name for protactinium. <ref name="why_not_used" />
MvMendelevium101Current symbol is Md. <ref name="why_not_used" />
NgNorwegium72Discredited claim to discovery of hafnium. <ref name="why_not_used" />
NiNiton86Former name for radon. <ref name="why_not_used" />
NoNorium72Discredited claim to discovery of hafnium. <ref name="why_not_used" />
NsNielsbohrium105Proposed name for dubnium. <ref name="why_not_used" />
NsNielsbohrium107Proposed name for bohrium. <ref name="why_not_used" />
NtNiton86Suggested name for radon. <ref name="why_not_used" />
NwNewtonium67Suggested name for holmium. <ref name="why_not_used" />
NyNeoytterbium70Former name of ytterbium. <ref name="why_not_used" />
OdOdinium62Suggested name for samarium. <ref name="why_not_used" />
PcPolicium110Proposed name for darmstadtium. <ref name="why_not_used" />
PePelopium41Former name for niobium. <ref name="why_not_used" />
PoPotassium19Current symbol is K. <ref name="why_not_used" />
PpPhilippium-Rare earth metal that proved to be a mixture of the elements holmium and samarium. <ref name="why_not_used" />
RfRutherfordium106Proposed name for seaborgium. The symbol and name were instead used for element 104. <ref name="why_not_used" />
SaSamarium62Current symbol is Sm. <ref name="why_not_used" />
SoSodium11Current symbol is Na. <ref name="why_not_used" />
SpSpectrium70Suggested name for ytterbium. <ref name="why_not_used" />
StAntimony51Current symbol is Sb. <ref name="why_not_used" />
TnThoron86Name given at one time to an isotope of radon identified in the decay chain of thorium. <ref name="why_not_used" />
TnTungsten74Current symbol is W. <ref name="why_not_used" />
TuThulium69Current symbol is Tm. <ref name="why_not_used" />
TuTungsten74Current symbol is W. <ref name="why_not_used" />
TyTyrium60Suggested name for neodymium. <ref name="why_not_used" />
UnbUnnilbium102Temporary name given to nobelium until that permanent name was chosen. <ref name="why_not_used" />
UneUnnilennium109Temporary name given to meitnerium until that permanent name was chosen. <ref name="why_not_used" />
UnhUnnilhexium106Temporary name given to seaborgium until that permanent name was chosen. <ref name="why_not_used" />
UnoUnniloctium108Temporary name given to hassium until that permanent name was chosen. <ref name="why_not_used" />
UnpUnnilpentium105Temporary name given to dubnium until that permanent name was chosen. <ref name="why_not_used" />
UnqUnnilquadium104Temporary name given to rutherfordium until that permanent name was chosen. <ref name="why_not_used" />
UnsUnnilseptium107Temporary name given to bohrium until that permanent name was chosen. <ref name="why_not_used" />
UntUnniltrium103Temporary name given to lawrencium until that permanent name was chosen. <ref name="why_not_used" />
UnuUnnilunium101Temporary name given to mendelevium until that permanent name was chosen. <ref name="why_not_used" />
UunUnunnilium110Temporary name given to darmstadtium until that permanent name was chosen. <ref name="why_not_used" />
UuuUnununium111Temporary name given to roentgenium until that permanent name was chosen. <ref name="why_not_used" />
ViVirginium87Discredited claim to discovery of francium. <ref name="why_not_used" />
VmVirginium87Discredited claim to discovery of francium. <ref name="why_not_used" />
YtYttrium39Current symbol is Y. <ref name="why_not_used" />

The meaning of symbols in Why Not Used
<references />

[edit] Other symbols that look like element symbols

[edit] Notes

[edit] References

[edit] 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 | Alternatives

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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List of elements by symbol

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