Periodic table with atomic weights

All 118 elements with their standard atomic weights. Tap an element to open it in the molar mass calculator.

Each tile shows the atomic number, the symbol and the standard atomic weight in g/mol, the values the molar mass calculator uses. Elements in grey have no standard atomic weight (no characteristic isotopic composition in nature), so they have no single molar mass. On a phone, scroll the table sideways or use the list below it.

1H1.008 2He4.0026 3Li6.94 4Be9.0122 5B10.81 6C12.011 7N14.007 8O15.999 9F18.998 10Ne20.180 11Na22.990 12Mg24.305 13Al26.982 14Si28.085 15P30.974 16S32.06 17Cl35.45 18Ar39.95 19K39.098 20Ca40.078 21Sc44.956 22Ti47.867 23V50.942 24Cr51.996 25Mn54.938 26Fe55.845 27Co58.933 28Ni58.693 29Cu63.546 30Zn65.38 31Ga69.723 32Ge72.630 33As74.922 34Se78.971 35Br79.904 36Kr83.798 37Rb85.468 38Sr87.62 39Y88.906 40Zr91.222 41Nb92.906 42Mo95.95 43Tc—44Ru101.07 45Rh102.91 46Pd106.42 47Ag107.87 48Cd112.41 49In114.82 50Sn118.71 51Sb121.76 52Te127.60 53I126.9 54Xe131.29 55Cs132.91 56Ba137.33 57La138.91 58Ce140.12 59Pr140.91 60Nd144.24 61Pm—62Sm150.36 63Eu151.96 64Gd157.25 65Tb158.93 66Dy162.50 67Ho164.93 68Er167.26 69Tm168.93 70Yb173.05 71Lu174.97 72Hf178.49 73Ta180.95 74W183.84 75Re186.21 76Os190.23 77Ir192.22 78Pt195.08 79Au196.97 80Hg200.59 81Tl204.38 82Pb207.2 83Bi208.98 84Po—85At—86Rn—87Fr—88Ra—89Ac—90Th232.04 91Pa231.04 92U238.03 93Np—94Pu—95Am—96Cm—97Bk—98Cf—99Es—100Fm—101Md—102No—103Lr—104Rf—105Db—106Sg—107Bh—108Hs—109Mt—110Ds—111Rg—112Cn—113Nh—114Fl—115Mc—116Lv—117Ts—118Og—

standard atomic weight (g/mol) no standard atomic weight

All 118 elements

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Z	Symbol	Element	Atomic weight
1	H	Hydrogen	1.008
2	He	Helium	4.0026
3	Li	Lithium	6.94
4	Be	Beryllium	9.0122
5	B	Boron	10.81
6	C	Carbon	12.011
7	N	Nitrogen	14.007
8	O	Oxygen	15.999
9	F	Fluorine	18.998
10	Ne	Neon	20.180
11	Na	Sodium	22.990
12	Mg	Magnesium	24.305
13	Al	Aluminium	26.982
14	Si	Silicon	28.085
15	P	Phosphorus	30.974
16	S	Sulfur	32.06
17	Cl	Chlorine	35.45
18	Ar	Argon	39.95
19	K	Potassium	39.098
20	Ca	Calcium	40.078
21	Sc	Scandium	44.956
22	Ti	Titanium	47.867
23	V	Vanadium	50.942
24	Cr	Chromium	51.996
25	Mn	Manganese	54.938
26	Fe	Iron	55.845
27	Co	Cobalt	58.933
28	Ni	Nickel	58.693
29	Cu	Copper	63.546
30	Zn	Zinc	65.38
31	Ga	Gallium	69.723
32	Ge	Germanium	72.630
33	As	Arsenic	74.922
34	Se	Selenium	78.971
35	Br	Bromine	79.904
36	Kr	Krypton	83.798
37	Rb	Rubidium	85.468
38	Sr	Strontium	87.62
39	Y	Yttrium	88.906
40	Zr	Zirconium	91.222
41	Nb	Niobium	92.906
42	Mo	Molybdenum	95.95
43	Tc	Technetium	none (no standard atomic weight)
44	Ru	Ruthenium	101.07
45	Rh	Rhodium	102.91
46	Pd	Palladium	106.42
47	Ag	Silver	107.87
48	Cd	Cadmium	112.41
49	In	Indium	114.82
50	Sn	Tin	118.71
51	Sb	Antimony	121.76
52	Te	Tellurium	127.60
53	I	Iodine	126.9
54	Xe	Xenon	131.29
55	Cs	Caesium	132.91
56	Ba	Barium	137.33
57	La	Lanthanum	138.91
58	Ce	Cerium	140.12
59	Pr	Praseodymium	140.91
60	Nd	Neodymium	144.24
61	Pm	Promethium	none (no standard atomic weight)
62	Sm	Samarium	150.36
63	Eu	Europium	151.96
64	Gd	Gadolinium	157.25
65	Tb	Terbium	158.93
66	Dy	Dysprosium	162.50
67	Ho	Holmium	164.93
68	Er	Erbium	167.26
69	Tm	Thulium	168.93
70	Yb	Ytterbium	173.05
71	Lu	Lutetium	174.97
72	Hf	Hafnium	178.49
73	Ta	Tantalum	180.95
74	W	Tungsten	183.84
75	Re	Rhenium	186.21
76	Os	Osmium	190.23
77	Ir	Iridium	192.22
78	Pt	Platinum	195.08
79	Au	Gold	196.97
80	Hg	Mercury	200.59
81	Tl	Thallium	204.38
82	Pb	Lead	207.2
83	Bi	Bismuth	208.98
84	Po	Polonium	none (no standard atomic weight)
85	At	Astatine	none (no standard atomic weight)
86	Rn	Radon	none (no standard atomic weight)
87	Fr	Francium	none (no standard atomic weight)
88	Ra	Radium	none (no standard atomic weight)
89	Ac	Actinium	none (no standard atomic weight)
90	Th	Thorium	232.04
91	Pa	Protactinium	231.04
92	U	Uranium	238.03
93	Np	Neptunium	none (no standard atomic weight)
94	Pu	Plutonium	none (no standard atomic weight)
95	Am	Americium	none (no standard atomic weight)
96	Cm	Curium	none (no standard atomic weight)
97	Bk	Berkelium	none (no standard atomic weight)
98	Cf	Californium	none (no standard atomic weight)
99	Es	Einsteinium	none (no standard atomic weight)
100	Fm	Fermium	none (no standard atomic weight)
101	Md	Mendelevium	none (no standard atomic weight)
102	No	Nobelium	none (no standard atomic weight)
103	Lr	Lawrencium	none (no standard atomic weight)
104	Rf	Rutherfordium	none (no standard atomic weight)
105	Db	Dubnium	none (no standard atomic weight)
106	Sg	Seaborgium	none (no standard atomic weight)
107	Bh	Bohrium	none (no standard atomic weight)
108	Hs	Hassium	none (no standard atomic weight)
109	Mt	Meitnerium	none (no standard atomic weight)
110	Ds	Darmstadtium	none (no standard atomic weight)
111	Rg	Roentgenium	none (no standard atomic weight)
112	Cn	Copernicium	none (no standard atomic weight)
113	Nh	Nihonium	none (no standard atomic weight)
114	Fl	Flerovium	none (no standard atomic weight)
115	Mc	Moscovium	none (no standard atomic weight)
116	Lv	Livermorium	none (no standard atomic weight)
117	Ts	Tennessine	none (no standard atomic weight)
118	Og	Oganesson	none (no standard atomic weight)

Weights: IUPAC standard atomic weights, abridged to five significant figures; for elements whose weight varies in nature (such as H, C, O, S, Cl) the conventional single value is used. More about the data.