1-56號元素的相對原子質量:1.氫H：1.00794；2.氦He:4.002602；3.鋰Li:6.941；4.鈹Be:9.012182；5.硼B(yǎng):10.811；6.碳C:12.0107；7.氮N:14.0067；8.氧O:15.9994；9.氟F:18.9984032；10.氖Ne:20.1797；11.鈉Na:22.98976928；12.鎂Mg:24.3050；13.鋁Al:26.9815386；14.硅Si:28.0855；15.磷P:30.973762；16.硫S:32.065；17.氯Cl:35.453；18.氬Ar:39.948；19.鉀K:39.0983；20.鈣Ca:40.078等。

21.鈧Sc:44.955912；22.鈦Ti:47.867；23.釩V:50.9415；24.鉻Cr:51.9961；25.錳Mn:54.938045；26.鐵Fe:55.845；27.鈷Co:58.933195；28.鎳Ni:58.6934；29.銅Cu:63.546；30.鋅Zn:65.39；31.鎵Ga:69.723；32.鍺Ge:72.64；33.砷As:74.92160；34.硒Se:78.96；35.溴Br:79.904；36.氪Kr:83.798；37.銣Rb:85.4678；38.鍶Sr:87.62；39.釔Y:88.90585；40.鋯Zr:91.224；41.鈮Nb:92.90638；42.鉬Mo:95.94；43.锝Tc:[97.9072]；44.釕Ru:101.07；45.銠Rh:102.90550；46.鈀Pd:106.42；47.銀Ag:107.8682；48.鎘Cd:112.411；49.銦In:114.818；50.錫Sn:118.710；51.銻Sb:121.760；52.碲Te:127.60；53.碘I:126.90447；54.氙Xe:131.293；55.銫Cs:132.9054519；56.鋇Ba:137.327。

57-71號元素的相對原子質量：57.鑭La:138.90547；58.鈰Ce:140.116；59.鐠Pr:140.90765；60.釹Nd:144.242；61.钷Pm:[145]；62.釤Sm:150.36；63.銪Eu:151.964；64.釓Gd:157.25；65.鋱Tb:158.92535；66.鏑Dy:162.500；67.鈥Ho:164.93032；68.鉺Er:167.259；69.銩Tm:168.93421；70.鐿Yb:173.04；71.镥Lu:174.967。

72-88號元素的相對原子質量：72.鉿Hf:178.49；73.鉭Ta:180.94788；74.鎢W:183.84；75.錸Re:186.207；76.鋨Os:190.23；77.銥Ir:192.217；78.鉑Pt:195.084；79.金Au:196.966569；80.汞Hg:200.59；81.鉈Tl:204.3833；82.鉛Pb:207.2；83.鉍Bi:208.98040；84.釙Po:[208.9824]；85.砹At:[209.9871]；86.氡Rn:[222.0176]；87.鈁Fr:[223]；88.鐳Ra:[226]。

89-103號元素的相對原子質量：89.錒Ac:[227]；90.釷Th:232.03806；91.鏷Pa:231.03588；92.鈾U:238.02891；93.镎Np:238.8486；94.钚Pu:242.8798；95.镅Am:244.8594；96.鋦Cm:246.911；97.锫Bk:248.9266；98.锎Cf:252.9578；99.锿Es:253.9656；100.鐨Fm:259.0046；101.鍆Md:260.0124；102.锘No:261.0202；103.鐒Lr:264.0436。

104-118號元素（注*的是人造元素）的相對原子質量：104.钅盧*Rf:269.0826；105.钅杜*Db:270.0904；106.钅喜*Sg:273.1138；107.钅波*Bh:274.1216；108.钅黑*Hs:272.106；109.钅麥*Mt:278.1528；110.鐽*Ds:283.1918；111.錀*Rg:282.184；112.鎶*Cn:287.223；113.暫無Uut:286.2152；114.鈇*Fl:291.1964；115.暫無Uup:290.1888；116.鉝*Lv:295.2268；117.暫無Uus:293.2116；118.暫無Uuo:299.2572。