Atomic

no.


NameSymbolGroupPeriodBlockState at

STP


OccurrenceDescription
1HydrogenH11sGasPrimordialNon-metal
2HeliumHe181sGasPrimordialNoble gas
3LithiumLi12sSolidPrimordialAlkali metal
4BerylliumBe22sSolidPrimordialAlkaline earth metal
5BoronB132pSolidPrimordialMetalloid
6CarbonC142pSolidPrimordialNon-metal
7NitrogenN152pGasPrimordialNon-metal
8OxygenO162pGasPrimordialNon-metal
9FluorineF172pGasPrimordialHalogen
10NeonNe182pGasPrimordialNoble gas
11SodiumNa13sSolidPrimordialAlkali metal
12MagnesiumMg23sSolidPrimordialAlkaline earth metal
13AluminiumAl133pSolidPrimordialMetal
14SiliconSi143pSolidPrimordialMetalloid
15PhosphorusP153pSolidPrimordialNon-metal
16SulphurS163pSolidPrimordialNon-metal
17ChlorineCl173pGasPrimordialHalogen
18ArgonAr183pGasPrimordialNoble gas
19PotassiumK14sSolidPrimordialAlkali metal
20CalciumCa24sSolidPrimordialAlkaline earth metal
21ScandiumSc34dSolidPrimordialTransition metal
22TitaniumTi44dSolidPrimordialTransition metal
23VanadiumV54dSolidPrimordialTransition metal
24ChromiumCr64dSolidPrimordialTransition metal
25ManganeseMn74dSolidPrimordialTransition metal
26IronFe84dSolidPrimordialTransition metal
27CobaltCo94dSolidPrimordialTransition metal
28NickelNi104dSolidPrimordialTransition metal
29CopperCu114dSolidPrimordialTransition metal
30ZincZn124dSolidPrimordialTransition metal
31GalliumGa134pSolidPrimordialMetal
32GermaniumGe144pSolidPrimordialMetalloid
33ArsenicAs154pSolidPrimordialMetalloid
34SeleniumSe164pSolidPrimordialNon-metal
35BromineBr174pLiquidPrimordialHalogen
36KryptonKr184pGasPrimordialNoble gas
37RubidiumRb15sSolidPrimordialAlkali metal
38StrontiumSr25sSolidPrimordialAlkaline earth metal
39YttriumY35dSolidPrimordialTransition metal
40ZirconiumZr45dSolidPrimordialTransition metal
41NiobiumNb55dSolidPrimordialTransition metal
42MolybdenumMo65dSolidPrimordialTransition metal
43TechnetiumTc75dSolidTransientTransition metal
44RutheniumRu85dSolidPrimordialTransition metal
45RhodiumRh95dSolidPrimordialTransition metal
46PalladiumPd105dSolidPrimordialTransition metal
47SilverAg115dSolidPrimordialTransition metal
48CadmiumCd125dSolidPrimordialTransition metal
49IndiumIn135pSolidPrimordialMetal
50TinSn145pSolidPrimordialMetal
51AntimonySb155pSolidPrimordialMetalloid
52TelluriumTe165pSolidPrimordialMetalloid
53IodineI175pSolidPrimordialHalogen
54XenonXe185pGasPrimordialNoble gas
55CaesiumCs16sSolidPrimordialAlkali metal
56BariumBa26sSolidPrimordialAlkaline earth metal
57LanthanumLa36fSolidPrimordialLanthanide
58CeriumCe36fSolidPrimordialLanthanide
59PraseodymiumPr36fSolidPrimordialLanthanide
60NeodymiumNd36fSolidPrimordialLanthanide
61PromethiumPm36fSolidTransientLanthanide
62SamariumSm36fSolidPrimordialLanthanide
63EuropiumEu36fSolidPrimordialLanthanide
64GadoliniumGd36fSolidPrimordialLanthanide
65TerbiumTb36fSolidPrimordialLanthanide
66DysprosiumDy36fSolidPrimordialLanthanide
67HolmiumHo36fSolidPrimordialLanthanide
68ErbiumEr36fSolidPrimordialLanthanide
69ThuliumTm36fSolidPrimordialLanthanide
70YtterbiumYb36fSolidPrimordialLanthanide
71LutetiumLu36dSolidPrimordialLanthanide
72HafniumHf46dSolidPrimordialTransition metal
73TantalumTa56dSolidPrimordialTransition metal
74TungstenW66dSolidPrimordialTransition metal
75RheniumRe76dSolidPrimordialTransition metal
76OsmiumOs86dSolidPrimordialTransition metal
77IridiumIr96dSolidPrimordialTransition metal
78PlatinumPt106dSolidPrimordialTransition metal
79GoldAu116dSolidPrimordialTransition metal
80MercuryHg126dLiquidPrimordialTransition metal
81ThalliumTl136pSolidPrimordialMetal
82LeadPb146pSolidPrimordialMetal
83BismuthBi156pSolidPrimordialMetal
84PoloniumPo166pSolidTransientMetal
85AstatineAt176pSolidTransientHalogen
86RadonRn186pGasTransientNoble gas
87FranciumFr17sSolidTransientAlkali metal
88RadiumRa27sSolidTransientAlkaline earth metal
89ActiniumAc37fSolidTransientActinide
90ThoriumTh37fSolidPrimordialActinide
91ProtactiniumPa37fSolidTransientActinide
92UraniumU37fSolidPrimordialActinide
93NeptuniumNp37fSolidTransientActinide
94PlutoniumPu37fSolidPrimordialActinide
95AmericiumAm37fSolidTransientActinide
96CuriumCm37fSolidTransientActinide
97BerkeliumBk37fSolidTransientActinide
98CaliforniumCf37fSolidTransientActinide
99EinsteiniumEs37fSolidSyntheticActinide
100FermiumFm37fSolidSyntheticActinide
101MendeleviumMd37fSolidSyntheticActinide
102NobeliumNo37fSolidSyntheticActinide
103LawrenciumLr37dSolid

(presumed)


SyntheticActinide
104RutherfordiumRf47dSolid

(presumed)


SyntheticTransition metal
105DubniumDb57dSyntheticTransition metal
106SeaborgiumSg67dSyntheticTransition metal
107BohriumBh77dSyntheticTransition metal
108HassiumHs87dSyntheticTransition metal
109MeitneriumMt97dSynthetic
110DarmstadtiumDs107dSynthetic
111RoentgeniumRg117dSynthetic
112CoperniciumCn127dSyntheticTransition metal
113NihoniumNh137pSynthetic
114FleroviumFl147pSynthetic
115MoscoviumMc157pSynthetic
116LivermoriumLv167pSynthetic
117TennesineTs177pSynthetic
118OganessonOg187pSynthetic

Chemical symNameOrigin of symbolNo.Atomic massDensity at 20°C°CMelting pointBoiling pointYear of discoveryDiscoverer
AcActinium89227,0278 g/mol10,07 g/cm31047 °C3197 °C1899Debierne
AgSilverLatin Argentum47107,8682 g/mol10,49 g/cm3961,9 °C2212 °Cprehistoricunknown
AlAluminium1326,981539 g/mol2,70 g/cm3660,5 °C2467 °C1825Oersted
AmAmericium95243,0614 g/mol13,67 g/cm3994 °C2607 °C1944Seaborg
ArArgon1839,948 g/mol1,66 g/l-189,4 °C-185,9 °C1894Ramsay and Rayleigh
AsArsenic3374,92159 g/mol5,72 g/cm3613 °C613 (Subl.) °Cca. 1250Albertus Magnus
AtAstatine85209,9871 g/mol7 g/cm3302 °C337 °C1940Corson and MacKenzie
AuGoldLatin Aurum79196,96654 g/mol19,32 g/cm31064,4 °C2940 °Cprehistoricunknown
BBoron510,811 g/mol2,46 g/cm32300 °C2550 °C1808Davy and Gay-Lussac
BaBarium56137,327 g/mol3,65 g/cm3725 °C1640 °C1808Davy
BeBeryllium49,012182 g/mol1,85 g/cm31278 °C2970 °C1797Vauquelin
BhBohrium107262,1229 g/mol1976Oganessian
BiBismuth83208,98037 g/mol9,80 g/cm3271,4 °C1560 °C1540Agricola
BkBerkelium97247,0703 g/mol13,25 g/cm3986 °C2627 °C1949Seaborg
BrBromine3579,904 g/mol3,14 g/cm3-7,3 °C58,8 °C1826Balard
CCarbon612,011 g/mol3,51 g/cm33550 °C4827 °Cprehistoricunknown
CaCalcium2040,078 g/mol1,54 g/cm3839 °C1487 °C1808Davy
CdCadmium48112,411 g/mol8,64 g/cm3321 °C765 °C1817Stromeyer and Hermann
CeCerium58140,115 g/mol6,77 g/cm3798 °C3257 °C1803von Hisinger and Berzelius
CfCalifornium98251,0796 g/mol15,1 g/cm3900 °C1472 °C1950Seaborg
ClChlorine1735,4527 g/mol2,95 g/l-34,6 °C-101 °C1774Scheele
CmCurium96247,0703 g/mol13,51 g/cm31340 °C3110 °C1944Seaborg
CoCobalt2758,9332 g/mol8,89 g/cm31495 °C2870 °C1735Brandt
CrChromium2451,9961 g/mol7,14 g/cm31857 °C2482 °C1797Vauquelin
CsCaesium55132,90543 g/mol1,90 g/cm328,4 °C690 °C1860Kirchhoff and Bunsen
CuCopperLatin Cuprum2963,546 g/mol8,92 g/cm31083,5 °C2595 °Cprehistoricunknown
DbDubnium105262,1138 g/mol1967/70Flerow oder Ghiorso
DsDarmstadtium110269 g/mol1994Society for Heavy Ion Research
DyDysprosium66162,5 g/mol8,56 g/cm31409 °C2335 °C1886Lecoq de Boisbaudran
ErErbium68167,26 g/mol9,05 g/cm31522 °C2510 °C1842Mosander
EsEinsteinium99252,0829 g/mol860 °C1952Seaborg
EuEuropium63151,965 g/mol5,25 g/cm3822 °C1597 °C1901Demaçay
FFluorine918,9984032 g/mol1,58 g/l-219,6 °C-188,1 °C1886Moissan
FeIronLatin Ferrum2655,847 g/mol7,87 g/cm31535 °C2750 °Cprehistoricunknown
FmFermium100257,0951 g/mol1952Seaborg
FrFrancium87223,0197 g/mol27 °C677 °C1939Perey
GaGallium3169,723 g/mol5,91 g/cm329,8 °C2403 °C1875Lecoq de Boiskaudran
GdGadolinium64157,25 g/mol7,89 g/cm31311 °C3233 °C1880de Marignac
GeGermanium3272,61 g/mol5,32 g/cm3937,4 °C2830 °C1886Winkler
HHydrogen11,00794 g/mol0,084 g/l-259,1 °C-252,9 °C1766Cavendish
HeHelium24,002602 g/mol0,17 g/l-272,2 °C-268,9 °C1895Ramsay and Cleve
HfHafnium72178,49 g/mol13,31 g/cm32150 °C5400 °C1923Coster and vón Hevesy
HgMercuryLatin Hydragyrum - quicksilver80200,59 g/mol13,55 g/cm3-38,9 °C356,6 °Cprehistoricunknown
HoHolmium67164,93032 g/mol8,78 g/cm31470 °C2720 °C1878Soret
HsHassium108265 g/mol1984Society for Heavy Ion Research
IIodine53126,90447 g/mol4,94 g/cm3113,5 °C184,4 °C1811Courtois
InIndium49114,82 g/mol7,31 g/cm3156,2 °C2080 °C1863Reich and Richter
IrIridium77192,22 g/mol22,65 g/cm32410 °C4130 °C1803Tenant and andere
KPotassiumGerman Kalium1939,0983 g/mol0,86 g/cm363,7 °C774 °C1807Davy
KrKrypton3683,8 g/mol3,48 g/l-156,6 °C-152,3 °C1898Ramsay and Travers
LaLanthanum57138,9055 g/mol6,16 g/cm3920 °C3454 °C1839Mosander
LiLithium36,941 g/mol0,53 g/cm3180,5 °C1317 °C1817Arfvedson
LrLawrencium103260,1053 g/mol1961Ghiorso
LuLutetium71174,967 g/mol9,84 g/cm31656 °C3315 °C1907Urbain
MdMendelevium101258,0986 g/mol1955Seaborg
MgMagnesium1224,305 g/mol1,74 g/cm3648,8 °C1107 °C1755Black
MnManganese2554,93805 g/mol7,44 g/cm31244 °C2097 °C1774Gahn
MoMolybdenum4295,94 g/mol10,28 g/cm32617 °C5560 °C1778Scheele
MtMeitnerium109266 g/mol1982Society for Heavy Ion Research
NNitrogen714,00674 g/mol1,17 g/l-209,9 °C-195,8 °C1772Rutherford
NaSodiumLatin Natrium1122,989768 g/mol0,97 g/cm397,8 °C892 °C1807Davy
NbNiobium4192,90638 g/mol8,58 g/cm32468 °C4927 °C1801Hatchet
NdNeodymium60144,24 g/mol7,00 g/cm31010 °C3127 °C1895von Welsbach
NeNeon1020,1797 g/mol0,84 g/l-248,7 °C-246,1 °C1898Ramsay and Travers
NiNickel2858,69 g/mol8,91 g/cm31453 °C2732 °C1751Cronstedt
NoNobelium102259,1009 g/mol1958Seaborg
NpNeptunium93237,0482 g/mol20,48 g/cm3640 °C3902 °C1940McMillan and Abelson
OOxygen815,9994 g/mol1,33 g/l-218,4 °C-182,9 °C1774Priestley and Scheele
OsOsmium76190,2 g/mol22,61 g/cm33045 °C5027 °C1803Tenant
PPhosphorus1530,973762 g/mol1,82 g/cm344 (P4) °C280 (P4) °C1669Brandt
PaProtactinium91231,0359 g/mol15,37 g/cm31554 °C4030 °C1917Soddy, Cranston and Hahn
PbLeadLatin Plumbum82207,2 g/mol11,34 g/cm3327,5 °C1740 °Cprehistoricunknown
PdPalladium46106,42 g/mol12,02 g/cm31552 °C3140 °C1803Wollaston
PmPromethium61146,9151 g/mol7,22 g/cm31080 °C2730 °C1945Marinsky and Glendenin
PoPolonium84208,9824 g/mol9,20 g/cm3254 °C962 °C1898Marie and Pierre Curie
PrPraseodymium59140,90765 g/mol6,48 g/cm3931 °C3212 °C1895von Welsbach
PtPlatinum78195,08 g/mol21,45 g/cm31772 °C3827 °C1557Scaliger
PuPlutonium94244,0642 g/mol19,74 g/cm3641 °C3327 °C1940Seaborg
RaRadium88226,0254 g/mol5,50 g/cm3700 °C1140 °C1898Marie and Pierre Curie
RbRubidium3785,4678 g/mol1,53 g/cm339 °C688 °C1861Bunsen and Kirchhoff
ReRhenium75186,207 g/mol21,03 g/cm33180 °C5627 °C1925Noddack, Tacke and Berg
RfRutherfordium104261,1087 g/mol1964/69Flerow oder Ghiorso
RgRoentgenium111272 g/mol1994Society for Heavy Ion Research
RhRhodium45102,9055 g/mol12,41 g/cm31966 °C3727 °C1803Wollaston
RnRadon86222,0176 g/mol9,23 g/l-71 °C-61,8 °C1900Dorn
RuRuthenium44101,07 g/mol12,45 g/cm32310 °C3900 °C1844Claus
SSulphur1632,066 g/mol2,06 g/cm3113 °C444,7 °Cprehistoricunknown
SbAntimonyLatin Stibium51121,75 g/mol6,69 g/cm3630,7 °C1750 °Cprehistoricunknown
ScScandium2144,95591 g/mol2,99 g/cm31539 °C2832 °C1879Nilson
SeSelenium3478,96 g/mol4,82 g/cm3217 °C685 °C1817Berzelius
SgSeaborgium106263,1182 g/mol1974Oganessian
SiSilicon1428,0855 g/mol2,33 g/cm31410 °C2355 °C1824Berzelius
SmSamarium62150,36 g/mol7,54 g/cm31072 °C1778 °C1879Lecoq de Boisbaudran
SnTinLatin Stannum50118,71 g/mol7,29 g/cm3232 °C2270 °Cprehistoricunknown
SrStrontium3887,62 g/mol2,63 g/cm3769 °C1384 °C1790Crawford
TaTantalum73180,9479 g/mol16,68 g/cm32996 °C5425 °C1802Ekeberg
TbTerbium65158,92534 g/mol8,25 g/cm31360 °C3041 °C1843Mosander
TcTechnetium4398,9063 g/mol11,49 g/cm32172 °C5030 °C1937Perrier and Segrè
TeTellurium52127,6 g/mol6,25 g/cm3449,6 °C990 °C1782von Reichenstein
ThThorium90232,0381 g/mol11,72 g/cm31750 °C4787 °C1829Berzelius
TiTitanium2247,88 g/mol4,51 g/cm31660 °C3260 °C1791Gregor and Klaproth
TlThallium81204,3833 g/mol11,85 g/cm3303,6 °C1457 °C1861Crookes
TmThulium69168,93421 g/mol9,32 g/cm31545 °C1727 °C1879Cleve
UUranium92238,0289 g/mol18,97 g/cm31132,4 °C3818 °C1789Klaproth
CnCopernicium112277 g/mol1996Society for Heavy Ion Research
LvLivermorium116
OgOganessan118
McMoscovium115
FlFlerovium114
TsTennesine117
NhNihonium113
VVanadium2350,9415 g/mol6,09 g/cm31890 °C3380 °C1801del Rio
WTungstenGerman Wolfram74183,85 g/mol19,26 g/cm33407 °C5927 °C1783Gebrüder de Elhuyar
XeXenon54131,29 g/mol4,49 g/l-111,9 °C-107 °C1898Ramsay and Travers
YYttrium3988,90585 g/mol4,47 g/cm31523 °C3337 °C1794Gadolin
YbYtterbium70173,04 g/mol6,97 g/cm3824 °C1193 °C1878de Marignac
ZnZinc3065,39 g/mol7,14 g/cm3419,6 °C907 °Cprehistoricunknown
ZrZirconium4091,224 g/mol6,51 g/cm31852 °C4377 °C1789Klaproth