Elements

AtomicNumberSymbolNameAtomicMassCPKHexColorElectronConfigurationElectronegativityAtomicRadiusIonizationEnergyElectronAffinityOxidationStatesStandardStateMeltingPointBoilingPointDensityGroupBlockYearDiscovered
1HHydrogen1.008FFFFFF1s12.212013.5980.754+1, -1Gas13.8120.288.988E-5Nonmetal1766
2HeHelium4.0026D9FFFF1s214024.5870Gas0.954.220.0001785Noble gas1868
3LiLithium7CC80FF[He]2s10.981825.3920.6181Solid453.6516150.534Alkali metal1817
4BeBeryllium9.012183C2FF00[He]2s21.571539.3232Solid156027441.85Alkaline earth metal1798
5BBoron10.81FFB5B5[He]2s2 2p12.041928.2980.2773Solid234842732.37Metalloid1808
6CCarbon12.011909090[He]2s2 2p22.5517011.261.263+4, +2, -4Solid382340982.267NonmetalAncient
7NNitrogen14.0073050F8[He] 2s2 2p33.0415514.534+5, +4, +3, +2, +1, -1, -2, -3Gas63.1577.360.0012506Nonmetal1772
8OOxygen15.999FF0D0D[He]2s2 2p43.4415213.6181.461-2Gas54.3690.20.001429Nonmetal1774
9FFluorine18.99840316a3f307[He]2s2 2p53.9813517.4233.339 (1.00000000000000000000)Gas53.5385.030.001696Halogen1670
10NeNeon20.18B3E3F5[He]2s2 2p615421.5650Gas24.5627.070.0008999Noble gas1898
11NaSodium22.9897693AB5CF2[Ne]3s10.932275.1390.5481Solid370.9511560.97Alkali metal1807
12MgMagnesium24.3058AFF00[Ne]3s21.311737.6462Solid92313631.74Alkaline earth metal1808
13AlAluminum26.981538BFA6A6[Ne]3s2 3p11.611845.9860.4413Solid933.43727922.7Post-transition metalAncient
14SiSilicon28.085F0C8A0[Ne]3s2 3p21.92108.1521.385+4, +2, -4Solid168735382.3296Metalloid1854
15PPhosphorus30.973762FF8000[Ne]3s2 3p32.1918010.4870.746+5, +3, -3Solid317.3553.651.82Nonmetal1669
16SSulfur32.07FFFF30[Ne]3s2 3p42.5818010.362.077+6, +4, -2Solid388.36717.752.067NonmetalAncient
17ClChlorine35.451FF01F[Ne]3s2 3p53.1617512.9683.617+7, +5, +1, -1Gas171.65239.110.003214Halogen1774
18ArArgon39.980D1E3[Ne]3s2 3p618815.760Gas83.887.30.0017837Noble gas1894
19KPotassium39.09838F40D4[Ar]4s10.822754.3410.5011Solid336.5310320.89Alkali metal1807
20CaCalcium40.083DFF00[Ar]4s212316.1132Solid111517571.54Alkaline earth metalAncient
21ScScandium44.95591E6E6E6[Ar]4s2 3d11.362116.5610.1883Solid181431092.99Transition metal1879
22TiTitanium47.867BFC2C7[Ar]4s2 3d21.541876.8280.079+4, +3, +2Solid194135604.5Transition metal1791
23VVanadium50.9415A6A6AB[Ar]4s2 3d31.631796.7460.525+5, +4, +3, +2Solid218336806Transition metal1801
24CrChromium51.9968A99C7[Ar]3d5 4s11.661896.7670.666+6, +3, +2Solid218029447.15Transition metal1797
25MnManganese54.938049C7AC7[Ar]4s2 3d51.551977.434+7, +4, +3, +2Solid151923347.3Transition metal1774
26FeIron55.84E06633[Ar]4s2 3d61.831947.9020.163+3, +2Solid181131347.874Transition metalAncient
27CoCobalt58.93319F090A0[Ar]4s2 3d71.881927.8810.661+3, +2Solid176832008.86Transition metal1735
28NiNickel58.69350D050[Ar]4s2 3d81.911637.641.156+3, +2Solid172831868.912Transition metal1751
29CuCopper63.55C88033[Ar]4s1 3d101.91407.7261.228+2, +1Solid1357.7728358.933Transition metalAncient
30ZnZinc65.47D80B0[Ar]4s2 3d101.651399.3942Solid692.6811807.134Transition metal1746
31GaGallium69.723C28F8F[Ar]4s2 3d10 4p11.811875.9990.33Solid302.9124775.91Post-transition metal1875
32GeGermanium72.63668F8F[Ar]4s2 3d10 4p22.012117.91.35+4, +2Solid1211.431065.323Metalloid1886
33AsArsenic74.92159BD80E3[Ar]4s2 3d10 4p32.181859.8150.81+5, +3, -3Solid10908875.776MetalloidAncient
34SeSelenium78.97FFA100[Ar]4s2 3d10 4p42.551909.7522.021+6, +4, -2Solid493.659584.809Nonmetal1817
35BrBromine79.9A62929[Ar]4s2 3d10 4p52.9618311.8143.365+5, +1, -1Liquid265.95331.953.11Halogen1826
36KrKrypton83.85CB8D1[Ar]4s2 3d10 4p63202140Gas115.79119.930.003733Noble gas1898
37RbRubidium85.468702EB0[Kr]5s10.823034.1770.4681Solid312.469611.53Alkali metal1861
38SrStrontium87.6200FF00[Kr]5s20.952495.6952Solid105016552.64Alkaline earth metal1790
39YYttrium88.9058494FFFF[Kr]5s2 4d11.222196.2170.3073Solid179536184.47Transition metal1794
40ZrZirconium91.2294E0E0[Kr]5s2 4d21.331866.6340.4264Solid212846826.52Transition metal1789
41NbNiobium92.9063773C2C9[Kr]5s1 4d41.62076.7590.893+5, +3Solid275050178.57Transition metal1801
42MoMolybdenum95.9554B5B5[Kr]5s1 4d52.162097.0920.7466Solid2896491210.2Transition metal1778
43TcTechnetium96.906363B9E9E[Kr]5s2 4d51.92097.280.55+7, +6, +4Solid2430453811Transition metal1937
44RuRuthenium101.1248F8F[Kr]5s1 4d72.22077.3611.053Solid2607442312.1Transition metal1827
45RhRhodium102.90550A7D8C[Kr]5s1 4d82.281957.4591.1373Solid2237396812.4Transition metal1803
46PdPalladium106.426985[Kr]4d102.22028.3370.557+3, +2Solid1828.05323612Transition metal1803
47AgSilver107.868C0C0C0[Kr]5s1 4d101.931727.5761.3021Solid1234.93243510.501Transition metalAncient
48CdCadmium112.41FFD98F[Kr]5s2 4d101.691588.9942Solid594.2210408.69Transition metal1817
49InIndium114.818A67573[Kr]5s2 4d10 5p11.781935.7860.33Solid429.7523457.31Post-transition metal1863
50SnTin118.71668080[Kr]5s2 4d10 5p21.962177.3441.2+4, +2Solid505.0828757.287Post-transition metalAncient
51SbAntimony121.769E63B5[Kr]5s2 4d10 5p32.052068.641.07+5, +3, -3Solid903.7818606.685MetalloidAncient
52TeTellurium127.6D47A00[Kr]5s2 4d10 5p42.12069.011.971+6, +4, -2Solid722.6612616.232Metalloid1782
53IIodine126.9045940094[Kr]5s2 4d10 5p52.6619810.4513.059+7, +5, +1, -1Solid386.85457.554.93Halogen1811
54XeXenon131.29429EB0[Kr]5s2 4d10 5p62.621612.130Gas161.36165.030.005887Noble gas1898
55CsCesium132.90545257178F[Xe]6s10.793433.8940.4721Solid301.599441.93Alkali metal1860
56BaBarium137.3300C900[Xe]6s20.892685.2122Solid100021703.62Alkaline earth metal1808
57LaLanthanum138.905570D4FF[Xe]6s2 5d11.12405.5770.53Solid119137376.15Lanthanide1839
58CeCerium140.116FFFFC7[Xe]6s2 4f1 5d11.122355.5390.5+4, +3Solid107136976.77Lanthanide1803
59PrPraseodymium140.90766D9FFC7[Xe]6s2 4f31.132395.4643Solid120437936.77Lanthanide1885
60NdNeodymium144.24C7FFC7[Xe]6s2 4f41.142295.5253Solid129433477.01Lanthanide1885
61PmPromethium144.91276A3FFC7[Xe]6s2 4f52365.553Solid131532737.26Lanthanide1945
62SmSamarium150.48FFFC7[Xe]6s2 4f61.172295.644+3, +2Solid134720677.52Lanthanide1879
63EuEuropium151.96461FFC7[Xe]6s2 4f72335.67+3, +2Solid109518025.24Lanthanide1901
64GdGadolinium157.245FFC7[Xe]6s2 4f7 5d11.22376.153Solid158635467.9Lanthanide1880
65TbTerbium158.9253530FFC7[Xe]6s2 4f92215.8643Solid162935038.23Lanthanide1843
66DyDysprosium162.51FFFC7[Xe]6s2 4f101.222295.9393Solid168528408.55Lanthanide1886
67HoHolmium164.9303300FF9C[Xe]6s2 4f111.232166.0223Solid174729738.8Lanthanide1878
68ErErbium167.2663BE7B[Xe]6s2 4f121.242356.1083Solid180231419.07Lanthanide1843
69TmThulium168.9342200D452[Xe]6s2 4f131.252276.1843Solid181822239.32Lanthanide1879
70YbYtterbium173.0500BF38[Xe]6s2 4f142426.254+3, +2Solid109214696.9Lanthanide1878
71LuLutetium174.966800AB24[Xe]6s2 4f14 5d11.272215.4263Solid193636759.84Lanthanide1907
72HfHafnium178.494DC2FF[Xe]6s2 4f14 5d21.32126.8254Solid2506487613.3Transition metal1923
73TaTantalum180.94794DA6FF[Xe]6s2 4f14 5d31.52177.890.3225Solid3290573116.4Transition metal1802
74WTungsten183.842194D6[Xe]6s2 4f14 5d42.362107.980.8156Solid3695582819.3Transition metal1783
75ReRhenium186.207267DAB[Xe]6s2 4f14 5d51.92177.880.15+7, +6, +4Solid3459586920.8Transition metal1925
76OsOsmium190.2266696[Xe]6s2 4f14 5d62.22168.71.1+4, +3Solid3306528522.57Transition metal1803
77IrIridium192.22175487[Xe]6s2 4f14 5d72.22029.11.565+4, +3Solid2719470122.42Transition metal1803
78PtPlatinum195.08D0D0E0[Xe]6s1 4f14 5d92.2820992.128+4, +2Solid2041.55409821.46Transition metal1735
79AuGold196.96657FFD123[Xe]6s1 4f14 5d102.541669.2262.309+3, +1Solid1337.33312919.282Transition metalAncient
80HgMercury200.59B8B8D0[Xe]6s2 4f14 5d10220910.438+2, +1Liquid234.32629.8813.5336Transition metalAncient
81TlThallium204.383A6544D[Xe]6s2 4f14 5d10 6p11.621966.1080.2+3, +1Solid577174611.8Post-transition metal1861
82PbLead207575961[Xe]6s2 4f14 5d10 6p22.332027.4170.36+4, +2Solid600.61202211.342Post-transition metalAncient
83BiBismuth208.98049E4FB5[Xe]6s2 4f14 5d10 6p32.022077.2890.946+5, +3Solid544.5518379.807Post-transition metal1753
84PoPolonium208.98243AB5C00[Xe]6s2 4f14 5d10 6p421978.4171.9+4, +2Solid52712359.32Metalloid1898
85AtAstatine209.98715754F45[Xe]6s2 4f14 5d10 6p52.22029.52.87, 5, 3, 1, -1Solid5757Halogen1940
86RnRadon222.01758428296[Xe]6s2 4f14 5d10 6p622010.7450Gas202211.450.00973Noble gas1900
87FrFrancium223.01973420066[Rn]7s10.73483.90.471Solid300Alkali metal1939
88RaRadium226.02541007D00[Rn]7s20.92835.2792Solid97314135Alkaline earth metal1898
89AcActinium227.0277570ABFA[Rn]7s2 6d11.12605.173Solid1324347110.07Actinide1899
90ThThorium232.03800BAFF[Rn]7s2 6d21.32376.084Solid2023506111.72Actinide1828
91PaProtactinium231.0358800A1FF[Rn]7s2 5f2 6d11.52435.89+5, +4Solid184515.37Actinide1913
92UUranium238.0289008FFF[Rn]7s2 5f3 6d11.382406.194+6, +5, +4, +3Solid1408440418.95Actinide1789
93NpNeptunium237.0481720080FF[Rn]7s2 5f4 6d11.362216.266+6, +5, +4, +3Solid917417520.25Actinide1940
94PuPlutonium244.0642006BFF[Rn]7s2 5f61.282436.06+6, +5, +4, +3Solid913350119.84Actinide1940
95AmAmericium243.06138545CF2[Rn]7s2 5f71.32445.993+6, +5, +4, +3Solid1449228413.69Actinide1944
96CmCurium247.07035785CE3[Rn]7s2 5f7 6d11.32456.023Solid1618340013.51Actinide1944
97BkBerkelium247.070318A4FE3[Rn]7s2 5f91.32446.23+4, +3Solid132314Actinide1949
98CfCalifornium251.07959A136D4[Rn]7s2 5f101.32456.33Solid1173Actinide1950
99EsEinsteinium252.083B31FD4[Rn]7s2 5f111.32456.423Solid1133Actinide1952
100FmFermium257.09511B31FBA[Rn] 5f12 7s21.36.53Solid1800Actinide1952
101MdMendelevium258.09843B30DA6[Rn]7s2 5f131.36.58+3, +2Solid1100Actinide1955
102NoNobelium259.101BD0D87[Rn]7s2 5f141.36.65+3, +2Solid1100Actinide1957
103LrLawrencium266.12C70066[Rn]7s2 5f14 6d11.33Solid1900Actinide1961
104RfRutherfordium267.122CC0059[Rn]7s2 5f14 6d24SolidTransition metal1964
105DbDubnium268.126D1004F[Rn]7s2 5f14 6d35, 4, 3SolidTransition metal1967
106SgSeaborgium269.128D90045[Rn]7s2 5f14 6d46, 5, 4, 3, 0SolidTransition metal1974
107BhBohrium270.133E00038[Rn]7s2 5f14 6d57, 5, 4, 3SolidTransition metal1976
108HsHassium269.1336E6002E[Rn]7s2 5f14 6d68, 6, 5, 4, 3, 2SolidTransition metal1984
109MtMeitnerium277.154EB0026[Rn]7s2 5f14 6d7 (calculated)9, 8, 6, 4, 3, 1SolidTransition metal1982
110DsDarmstadtium282.166[Rn]7s2 5f14 6d8 (predicted)8, 6, 4, 2, 0Expected to be a SolidTransition metal1994
111RgRoentgenium282.169[Rn]7s2 5f14 6d9 (predicted)5, 3, 1, -1Expected to be a SolidTransition metal1994
112CnCopernicium286.179[Rn]7s2 5f14 6d10 (predicted)2, 1, 0Expected to be a SolidTransition metal1996
113NhNihonium286.182[Rn]5f14 6d10 7s2 7p1 (predicted)Expected to be a SolidPost-transition metal2004
114FlFlerovium290.192[Rn]7s2 7p2 5f14 6d10 (predicted)6, 4,2, 1, 0Expected to be a SolidPost-transition metal1998
115McMoscovium290.196[Rn]7s2 7p3 5f14 6d10 (predicted)3, 1Expected to be a SolidPost-transition metal2003
116LvLivermorium293.205[Rn]7s2 7p4 5f14 6d10 (predicted)+4, +2, -2Expected to be a SolidPost-transition metal2000
117TsTennessine294.211[Rn]7s2 7p5 5f14 6d10 (predicted)+5, +3, +1, -1Expected to be a SolidHalogen2010
118OgOganesson295.216[Rn]7s2 7p6 5f14 6d10 (predicted)+6, +4, +2, +1, 0, -1Expected to be a GasNoble gas2006