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Groep 1 2 3   4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Alkalimetalen Aardalkalimetalen Pnictogenen Chalcogenen Halogenen Edele gassen
Periode

1

Waterstof1H1.008 Helium2He4.0026
2 Lithium3Li6.94 Beryllium4Be9.0122 Borium5B10.81 Carbon Fibre6C12.011 Stikstof7N14.007 Zuurstof8O15.999 Fluor9F18.998 Neon10Ne20.180
3 Natrium11Na22.990 Magnesium12Mg24.305 Aluminium13Al26.982 Silicium14Si28.085 Fosfor15P30.974 Zwavel16S32.06 Chloor17Cl35.45 argon18Ar39.948
4 Kalium19K39.098 Calcium20Ca40.078 Scandium21Sc44.956 Titanium22Ti47.867 Vanadium23V50.942 Chroom24Cr51.996 Mangaan25Mn54.938 Ijzer26Fe55.845 Cobalt27Co58.933 Nikkel28Ni58.693 Koper29Cu63.546 zink30Zn65.38 Gallium31Ga69.723 Germanium32Ge72.630 Arseen33As74.922 Selenium34Se78.971 Broom35Br79.904 Krypton36Kr83.798
5 Rubidium37Rb85.468 Strontium38Sr87.62 yttrium39Y88.906 Zirkonium40Zr91.224 Niobium41Nb92.906 Molybdeen42Mo95.95 Technetium43Tc[98] Ruthenium44Ru101.07 Rhodium45Rh102.91 Palladium46Pd106.42 Zilver47Ag107.87 Cadmium48Cd112.41 Indium49In114.82 Tin50Sn118.71 Antimoon51Sb121.76 Tellurium52Te127.60 Jodium53I126.90 Xenon54Xe131.29
6 Cesium55Cs132.91 Barium56Ba137.33 Lanthaan57La138.91 1 sterretje Hafnium72Hf178.49 Tantaal73Ta180.95 Wolfraam74W183.84 Rhenium75Re186.21 Osmium76Os190.23 Iridium77Ir192.22 Platina78Pt195.08 Goud79Au196.97 Kwik80Hg200.59 tallium81Tl204.38 Leiden82Pb207.2 Bismut83Bi208.98 Polonium84Po[209] Astatine85At[210] Radon86Rn[222]
7 Francium87Fr[223] Radium88Ra[226] Actinium89Ac[227] 1 sterretje 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 sterretje cerium58Ce140.12 Praseodymium59Pr140.91 Neodymium60Nd144.24 Promethium61Pm[145] Samarium62Sm150.36 Europium63Eu151.96 Gadolinium64Gd157.25 Terbium65Tb158.93 Dysprosium66Dy162.50 Holmium67Ho164.93 erbium68Er167.26 thulium69Tm168.93 Ytterbium70Yb173.05 Lutetium71Lu174.97  
1 sterretje Thorium90Th232.04 Protactinium91Pa231.04 Uranium92U238.03 Neptunium93Np[237] Plutonium94Pu[244] Americium95Am[243] curium96Cm[247] Berkelium97Bk[247] Californium98Cf[251] Einsteinium99Es[252] Fermium100Fm[257] Mendelevium101Md[258] Nobelium102Nee[259] Lawrencium103Lr[266]

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