PERIODICA · Tableau périodique · Base de données encyclopédique des éléments

1HHydrogène1.008 2HeHélium4.003 3LiLithium6.94 4BeBéryllium9.012 5BBore10.81 6CCarbone12.011 7NAzote14.007 8OOxygène15.999 9FFluor18.998 10NeNéon20.18 11NaSodium22.99 12MgMagnésium24.305 13AlAluminium26.982 14SiSilicium28.085 15PPhosphore30.974 16SSoufre32.06 17ClChlore35.45 18ArArgon39.948 19KPotassium39.098 20CaCalcium40.078 21ScScandium44.956 22TiTitane47.867 23VVanadium50.942 24CrChrome51.996 25MnManganèse54.938 26FeFer55.845 27CoCobalt58.933 28NiNickel58.693 29CuCuivre63.546 30ZnZinc65.382 31GaGallium69.723 32GeGermanium72.631 33AsArsenic74.922 34SeSélénium78.972 35BrBrome79.904 36KrKrypton83.798 37RbRubidium85.468 38SrStrontium87.621 39YYttrium88.906 40ZrZirconium91.224 41NbNiobium92.906 42MoMolybdène95.951 43TcTechnétium98 44RuRuthénium101.072 45RhRhodium102.906 46PdPalladium106.421 47AgArgent107.868 48CdCadmium112.414 49InIndium114.818 50SnÉtain118.711 51SbAntimoine121.76 52TeTellure127.603 53IIode126.904 54XeXénon131.294 55CsCésium132.905 56BaBaryum137.328 57–71 72HfHafnium178.492 73TaTantale (chimie)180.948 74WTungstène183.841 75ReRhénium186.207 76OsOsmium190.233 77IrIridium192.217 78PtPlatine195.085 79AuOr196.967 80HgMercure200.592 81TlThallium204.38 82PbPlomb207.21 83BiBismuth208.98 84PoPolonium209 85AtAstate210 86RnRadon222 87FrFrancium223 88RaRadium226 89–103 104RfRutherfordium267 105DbDubnium268 106SgSeaborgium269 107BhBohrium270 108HsHassium269 109MtMeitnérium278 110DsDarmstadtium281 111RgRoentgenium282 112CnCopernicium285 113NhNihonium286 114FlFlérovium289 115McMoscovium289 116LvLivermorium293 117TsTennesse294 118OgOganesson294