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Group 1 2 3   4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Alkalimálmar Jarðalkalískir málmar Pnictogens Kalkfrumur Halógen Göfugar lofttegundir
tímabil

1

Vetni1H1.008 Helium2He4.0026
2 Lithium3Li6.94 Beryllium4Be9.0122 Bór5B10.81 Carbon6C12.011 Köfnunarefni7N14.007 Súrefni8O15.999 Flúor9F18.998 Neon10Ne20.180
3 Natríum11Na22.990 Magnesíum12Mg24.305 Ál13Al26.982 Kísill14Si28.085 Fosfór15P30.974 Sulphur16S32.06 Klór17Cl35.45 Argon18Ar39.948
4 Kalíum19K39.098 Kalsíum20Ca40.078 Skandíum21Sc44.956 Títan22Ti47.867 Vanadín23V50.942 Króm24Cr51.996 Mangan25Mn54.938 Járn26Fe55.845 Cobalt27Co58.933 Nikkel28Ni58.693 Kopar29Cu63.546 sink30Zn65.38 Gallium31Ga69.723 Germanium32Ge72.630 Arsen33As74.922 Selen34Se78.971 Bróm35Br79.904 Krypton36Kr83.798
5 Rubidium37Rb85.468 Strontium38Sr87.62 Yttrium39Y88.906 Sirkón40Zr91.224 Níóbíum41Nb92.906 Mólýbden42Mo95.95 Technetium43Tc[98] Ruthenium44Ru101.07 Rhodium45Rh102.91 Palladium46Pd106.42 silfur47Ag107.87 Kadmíum48Cd112.41 Indíum49In114.82 Tin50Sn118.71 Mótefni51Sb121.76 Tellurium52Te127.60 Joð53I126.90 Xenon54Xe131.29
6 Sesíum55Cs132.91 Baríum56Ba137.33 Lanthanum57La138.91 1 stjarna Hafnium72Hf178.49 Tantal73Ta180.95 Volfram74W183.84 Rhenium75Re186.21 Osmium76Os190.23 Iridium77Ir192.22 Platín78Pt195.08 Gold79Au196.97 Kvikasilfur80Hg200.59 Þallíum81Tl204.38 Blý82Pb207.2 Bismút83Bi208.98 Pólóníum84Po[209] Astatín85At[210] Radon86Rn[222]
7 Francium87Fr[223] Radíum88Ra[226] Actinium89Ac[227] 1 stjarna Rutherfordium104Rf[267] Dubnium105Db[268] Seaborgium106Sg[269] Bohrium107Bh[270] Hassium108Hs[270] Meitnerium109Mt[278] Darmstadtium110Ds[281] Roentgenium111Rg[282] Copernicium112Cn[285] Nihonium113Nh[286] Flerovium114Fl[289] Moscovium115Mc[290] Livermorium116Lv[293] Tennessine117Ts[294] Oganesson118Og[294]
1 stjarna Cerium58Ce140.12 Praseodymium59Pr140.91 Neodymium60Nd144.24 Promethium61Pm[145] Samarium62Sm150.36 Europium63Eu151.96 Gadolinium64Gd157.25 Terbium65Tb158.93 Dysprosium66Dy162.50 Holmium67Ho164.93 Erbíum68Er167.26 Thulium69Tm168.93 Ytterbium70Yb173.05 Lutetium71Lu174.97  
1 stjarna Thorium90Th232.04 Protactinium91Pa231.04 Úran92U238.03 Neptunium93Np[237] Plútóníum94Pu[244] Americium95Am[243] Curium96Cm[247] Berkelium97Bk[247] Kaliforníu98Cf[251] Einsteinium99Es[252] Fermium100Fm[257] Mendelevium101Md[258] Nóbels102Nr[259] Lawrencium103Lr[266]

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