Periodic Table of Elements with Atomic Mass

Periodic Table – Atomic Mass

Periodic Table – Atomic Mass

H
1.008
He
4.0026
Li
7
Be
9.012183
B
10.81
C
12.011
N
14.007
O
15.999
F
18.99840316
Ne
20.18
Na
22.9897693
Mg
24.305
Al
26.981538
Si
28.085
P
30.973762
S
32.07
Cl
35.45
Ar
39.9
K
39.0983
Ca
40.08
Sc
44.95591
Ti
47.867
V
50.9415
Cr
51.996
Mn
54.93804
Fe
55.84
Co
58.93319
Ni
58.693
Cu
63.55
Zn
65.4
Ga
69.723
Ge
72.63
As
74.92159
Se
78.97
Br
79.9
Kr
83.8
Rb
85.468
Sr
87.62
Y
88.90584
Zr
91.22
Nb
92.90637
Mo
95.95
Tc
96.90636
Ru
101.1
Rh
102.9055
Pd
106.42
Ag
107.868
Cd
112.41
In
114.818
Sn
118.71
Sb
121.76
Te
127.6
I
126.9045
Xe
131.29
Cs
132.905452
Ba
137.33
La
138.9055
Hf
178.49
Ta
180.9479
W
183.84
Re
186.207
Os
190.2
Ir
192.22
Pt
195.08
Au
196.96657
Hg
200.59
Tl
204.383
Pb
207
Bi
208.9804
Po
208.98243
At
209.98715
Rn
222.01758
La
138.9055
Ce
140.116
Pr
140.90766
Nd
144.24
Pm
144.91276
Sm
150.4
Eu
151.964
Gd
157.25
Tb
158.92535
Dy
162.5
Ho
164.93033
Er
167.26
Tm
168.93422
Yb
173.05
Lu
174.9667
Fr
223.01973
Ra
226.02541
Ac
227.02775
Rf
267.122
Db
268.126
Sg
269.128
Bh
270.133
Hs
269.1336
Mt
277.154
Ds
282.166
Rg
282.169
Cn
286.179
Nh
286.182
Fl
290.192
Mc
290.196
Lv
293.205
Ts
294.211
Og
295.216
Ac
227.02775
Th
232.038
Pa
231.03588
U
238.0289
Np
237.048172
Pu
244.0642
Am
243.06138
Cm
247.07035
Bk
247.07031
Cf
251.07959
Es
252.083
Fm
257.09511
Md
258.09843
No
259.101
Lr
266.12

This periodic table displays each element’s atomic number, symbol, name, and atomic mass. The atomic mass represents the weighted average of an element’s isotopes, factoring in their natural abundances. To keep things simple for calculations, this table presents the most up-to-date single-value atomic masses. While IUPAC suggests atomic mass ranges for many elements—since isotope ratios vary slightly depending on location—using a fixed number makes chemistry much more convenient!

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