n
1.008665
0
neutron
n
1.008665
0
neutron
H
1.00797
1
hydrogen
H
1.00797
1
hydrogen
He
4.0026
2
helium
He
4.0026
2
helium
Li
6.941
3
lithium
Be
9.01218
4
beryllium
B
10.811
5
boron
B
10.811
5
boron
C
12.011
6
carbon
N
14.0067
7
nitrogen
O
15.9994
8
oxygen
F
18.9984
9
fluorine
Ne
20.1797
10
neon
Ne
20.1797
10
neon
Na
22.98977
11
sodium
Mg
24.305
12
magnesium
Al
26.98154
13
aluminum
Al
26.98154
13
aluminum
Si
28.0855
14
silicon
P
30.97376
15
phosphorus
S
32.066
16
sulfur
Cl
35.4527
17
chlorine
Ar
39.948
18
argon
Ar
39.948
18
argon
K
39.0983
19
potassium
Ca
40.078
20
calcium
Sc
44.9559
21
scandium
Ti
47.88
22
titanium
V
50.9415
23
vanadium
Cr
51.996
24
chromium
Mn
54.938
25
manganese
Fe
55.847
26
iron
Co
58.9332
27
cobalt
Ni
58.6934
28
nickel
Cu
63.456
29
copper
Zn
65.39
30
zinc
Ga
69.723
31
gallium
Ge
72.61
32
germanium
As
74.9216
33
arsenic
Se
78.96
34
selenium
Br
79.904
35
bromine
Kr
83.8
36
krypton
Kr
83.8
36
krypton
Rb
85.4678
37
rubidium
Sr
87.62
38
strontium
Y
88.9059
39
yttrium
Zr
91.224
40
zirconium
Nb
92.9064
41
niobium
Mo
95.94
42
molybdenum
Tc
98
43
technetium
Ru
101.07
44
ruthenium
Rh
102.9055
45
rhodium
Pd
106.42
46
palladium
Ag
107.868
47
silver
Cd
112.41
48
cadmium
In
114.82
49
indium
Sn
118.71
50
tin
Sb
121.757
51
antimony
Te
127.6
52
tellurium
I
126.9045
53
iodine
Xe
131.29
54
xenon
Xe
131.29
54
xenon
Cs
132.9054
55
cesium
Ba
137.33
56
barium
Hf
178.49
72
hafnium
Ta
180.9479
73
tantalum
W
183.85
74
tungsten
Re
186.207
75
rhenium
Os
190.2
76
osmium
Ir
192.22
77
iridium
Pt
195.08
78
platinum
Au
196.9665
79
gold
Hg
200.59
80
mercury
Tl
204.383
81
thallium
Pb
207.2
82
lead
Bi
208.9804
83
bismuth
Po
209
84
polonium
At
210
85
astatine
Rn
222
86
radon
Rn
222
86
radon
Fr
223
87
francium
Ra
226.0254
88
radium
Rf
267
104
rutherfordium
Db
268
105
dubnium
Sg
271
106
seaborgium
Bh
272
107
bohrium
Hs
270
108
hassium
Mt
276
109
meitnerium
Ds
281
110
darmstadtium
Rg
280
111
roentgenium
Cn
285
112
copernicium
Nh
284
113
nihonium
Fl
289
114
flerovium
Mc
288
115
moscovium
Lv
293
116
livermorium
Ts
294
117
tennessine
Og
294
118
oganesson
Og
294
118
oganesson