1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
6*
7*
57–71 ↓
89–103 ↓
1HHydrogen1.008
2HeHelium4.003
3LiLithium6.941
4BeBeryllium9.012
5BBoron10.81
6CCarbon12.011
7NNitrogen14.007
8OOxygen15.999
9FFluorine18.998
10NeNeon20.180
11NaSodium22.990
12MgMagnesium24.305
13AlAluminium26.982
14SiSilicon28.086
15PPhosphorus30.974
16SSulfur32.06
17ClChlorine35.45
18ArArgon39.948
19KPotassium39.098
20CaCalcium40.078
21ScScandium44.956
22TiTitanium47.867
23VVanadium50.942
24CrChromium51.996
25MnManganese54.938
26FeIron55.845
27CoCobalt58.933
28NiNickel58.693
29CuCopper63.546
30ZnZinc65.38
31GaGallium69.723
32GeGermanium72.63
33AsArsenic74.922
34SeSelenium78.971
35BrBromine79.904
36KrKrypton83.798
37RbRubidium85.468
38SrStrontium87.62
39YYttrium88.906
40ZrZirconium91.224
41NbNiobium92.906
42MoMolybdenum95.96
43TcTechnetium[98]
44RuRuthenium101.07
45RhRhodium192.22
46PdPalladium106.42
47AgSilver107.87
48CdCadmium112.41
49InIndium114.82
50SnTin118.71
51SbAntimony121.76
52TeTellurium127.60
53IIodine126.90
54XeXenon131.29
55CsCaesium132.91
56BaBarium137.33
57LaLanthanum138.91
58CeCerium140.12
59PrPraseodymium140.91
60NdNeodymium144.24
61PmPromethium[145]
62SmSamarium150.36
63EuEuropium151.96
64GdGadolinium157.25
65TbTerbium158.93
66DyDysprosium162.50
67HoHolmium164.93
68ErErbium167.26
69TmThulium168.93
70YbYtterbium173.05
71LuLutetium174.97
72HfHafnium178.49
73TaTantalum180.95
74WTungsten183.84
75ReRhenium186.21
76OsOsmium190.23
77IrIridium192.22
78PtPlatinum195.08
79AuGold196.97
80HgMercury200.59
81TlThallium204.38
82PbLead207.2
83BiBismuth208.98
84PoPolonium[209]
85AtAstatine[210]
86RnRadon[222]
87FrFrancium[223]
88RaRadium[226]
89AcActinium[227]
90ThThorium232.04
91PaProtactinium231.04
92UUranium238.03
93NpNeptunium[237]
94PuPlutonium[244]
95AmAmericium[243]
96CmCurium[247]
97BkBerkelium[247]
98CfCalifornium[251]
99EsEinsteinium[252]
100FmFermium[257]
101MdMendelevium[258]
102NoNobelium[259]
103LrLawrencium[266]
104RfRutherfordium[267]
105DbDubnium[268]
106SgSeaborgium[271]
107BhBohrium[272]
108HsHassium[270]
109MtMeitnerium[278]
110DsDarmstadtium[281]
111RgRoentgenium[282]
112CnCopernicium[285]
113NhNihonium[286]
114FlFlerovium[289]
115McMoscovium[290]
116LvLivermorium[293]
117TsTennessine[294]
118OgOganesson[294]