氢1.007841H锂6.9383Li钠22.9897711Na钾39.098319K铷85.467837Rb铯132.905555Cs钫(223)87Fr铍9.012184Be镁24.305112Mg钙40.07820Ca锶87.6238Sr钡137.32856Ba镭(226)88Ra钪44.9559121Sc钛47.86722Ti钒50.941523V铬51.996224Cr锰54.9380525Mn铁55.84526Fe钴58.933227Co镍58.693428Ni铜63.54629Cu锌65.3830Zn镓69.72331Ga铝26.9815413Al钇88.9058539Y锆91.22440Zr铌92.9063841Nb钼95.9642Mo锝(99)43Tc钌101.0744Ru铑102.905545Rh钯106.4246Pd银107.868247Ag镉112.41248Cd铟114.81849In锗72.6332Ge砷74.921633As硒78.9634Se溴79.90435Br氪83.79836Kr硅28.08414Si磷30.9737615P硫32.05916S氯35.44617Cl氩39.94818Ar氖20.179710Ne氦4.00262He硼10.8065B碳12.00966C氮14.006437N氧15.999038O氟18.99849F锡118.71050Sn锑121.76051Sb碲127.652Te碘126.9044753I砹(210)85At氙131.29454Xe氡(222)86Rn镧系57-71La-Lu铪178.4972Hf钽180.9478873Ta钨183.8474W铼186.20775Re锇190.2376Os铱192.21777Ir铂195.08578Pt金196.9665779Au汞200.5980Hg铊204.38281Tl铅207.282Pb铋208.980483Bi钋(209)84Po锕系89-103Ac-Lr镧系Ln锕系An镧138.9054857La锕(227)89Ac铈140.11658Ce镨140.9076559Pr钕144.24260Nd钷(147)61Pm钐150.3662Sm铕151.96463Eu钆157.2564Gd铽158.9253565Tb镝162.566Dy钬164.9303267Ho铒167.25968Er铥168.9342169Tm镱173.05470Yb镥174.966871Lu钍232.0380690Th镤231.0358891Pa铀238.0289192U镎(237)93Np钚(244)94Pu镅*(243)95Am锔*(247)96Cm锫*(247)97Bk锎*(251)98Cf锿*(252)99Es镄*(257)100Fm钔*(258)101Md锘*(259)102No铹*(260)103Lr元素周期表氢1.007841H元素符号红色为放射性元素原子量原子序数元素名称注*的为人造元素IAIIAIIIBIVBVBVIBVIIBVIIIIBIIBIIIAIVAVAVIAVIIA01234567族周期电子层K0族电子数LKMLKNMLKONMLKPONMLKQPONMLK28288281882818188281832188281832321882(261)104Rf*(262)105Db*(266)106Sg*(264)107Bh*(269)108Hs*(268)109Mt*(271)110Ds*(272)111Rg*(285)112Cn*(284)113Uut*(289)114Fl*(288)115Uup*(293)116Lv*(294)117Uus*(294)118Uuo*