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International System of Units – Prefixes

Z

Name

Symbol

Mass of Atom (u)

% Abundance

1Hydrogen
Deuterium
Tritium
1H
2H
3H
1.007825
2.014102
3.016049
99.9885
0.115
*
2Helium3He
4He
3.016029
4.002603
0.000137
99.999863
3Lithium6Li
7Li
6.015122
7.016004
7.59
92.41
4Beryllium9Be9.012182100
5Boron10B
11B
10.012937
11.009305
19.9
80.1
6Carbon12C
13C
14C
12.000000
13.003355
14.003242
98.93
1.07
*
7Nitrogen14N
15N
14.003074
15.000109
99.632
0.368
8Oxygen16O
17O
18O
15.994915
16.999132
17.999160
99.757
0.038
0.205
9Fluorine19F18.998403100
10Neon20Ne
21Ne
22Ne
19.992440
20.993847
21.991386
90.48
0.27
9.25
11Sodium23Na22.98770100
12Magnesium24Mg
25Mg
26Mg
23.985042
24.985837
25.982593
78.99
10
11.01
13Aluminum27Al26.981538100
14Silicon28Si
29Si
30Si
27.976927
28.976495
29.973770
92.2297
4.6832
3.0872
15Phosphorus31P30.973762100
16Sulpher32S
33S
34S
36S
31.972071
32.971458
33.967867
35.967081
94.93
0.76
4.29
0.02
17Chlorine35Cl
37Cl
34.968853
36.965903
75.78
24.22
18Argon36Ar
38Ar
40Ar
35.967546
37.962732
39.962383
0.3365
0.0632
99.6003
19Potassium39K
40K
41K
38.963707
39.963999
40.961826
93.2581
0.0117
6.7302
20Calcium40Ca
42Ca
43Ca
44Ca
46Ca
48Ca
39.962591
41.958618
42.958767
43.955481
45.953693
47.952534
96.941
0.647
0.135
2.086
0.004
0.187
21Scandium45Sc44.955910100
22Titanium46Ti
47Ti
48Ti
49Ti
50Ti
45.952629
46.951764
47.947947
48.947871
49.944792
8.25
7.44
73.72
5.41
5.18
23Vanadium50V
51V
49.947163
50.943964
0.250
99.750
24Chromium50Cr
52Cr
53Cr
54Cr
49.946050
51.940512
52.940654
53.938885
4.345
83.789
9.501
2.365
25Manganese55Mn54.938050100
26Iron54Fe
56Fe
57Fe
58Fe
53.939615
55.934942
56.935399
57.933280
5.845
91.754
2.119
0.282
27Cobalt59Co58.933200100
28Nickel58Ni
60Ni
61Ni
62Ni
64Ni
57.935348
59.930791
60.931060
61.928349
63.927970
68.0769
26.2231
1.1399
3.6345
0.9256
29Copper63Cu
65Cu
62.929601
64.927794
69.17
30.83
30Zinc64Zn
66Zn
67Zn
68Zn
70Zn
63.929147
65.926037
66.927131
67.924848
69.925325
48.63
27.90
4.10
18.75
0.62
31Gallium69Ga
71Ga
68.925581
70.924705
60.108
39.892
32Germanium70Ge
72Ge
73Ge
74Ge
76Ge
69.924250
71.922076
72.923459
73.921178
75.921403
20.84
27.54
7.73
36.28
7.61
33Arsenic75As74.921596100
34Selenium74Se
76Se
77Se
78Se
80Se
82Se
73.922477
75.919214
76.919915
77.917310
79.916522
81.916700
0.89
9.37
7.63
23.77
49.61
8.73
35Bromine79Br
81Br
78.918338
80.916291
50.69
49.31
36Krypton78Kr
80Kr
82Kr
83Kr
84Kr
86Kr
77.920386
79.916378
81.913485
82.914136
83.911507
85.910610
0.35
2.28
11.58
11.49
57.00
17.30
37Rubidium85Rb
87Rb
84.911789
86.909183
72.17
27.83
38Strontium84Sr
86Sr
87Sr
88Sr
83.913425
85.909262
86.908879
87.905614
0.56
9.86
7.00
82.58
39Yttrium89Y88.905848100
40Zirconium90Zr
91Zr
92Zr
94Zr
96Zr
89.904704
90.905645
91.905040
93.906316
95.908276
51.45
11.22
17.15
17.38
2.80
41Niobium93Nb92.906378100
42Molybdenum92Mo
94Mo
95Mo
96Mo
97Mo
98Mo
100Mo
91.906810
93.905088
94.905841
95.904679
96.906021
97.905408
99.907477
14.84
9.25
15.92
16.68
9.55
24.13
9.63
43Technetium98Tc97.907216*
44Ruthenium96Ru
98Ru
99Ru
100Ru
101Ru
102Ru
104Ru
95.907598
97.905287
98.905939
99.904220
100.905582
101.904350
103.905430
5.54
1.87
12.76
12.60
17.06
31.55
18.62
45Rhodium103Rh102.905504100
46Palladium102Pd
104Pd
105Pd
106Pd
108Pd
110Pd
101.905608
103.904035
104.905084
105.903483
107.903894
109.905152
1.02
11.14
22.33
27.33
26.46
11.72
47Silver107Ag
109Ag
106.905093
108.904756
51.839
48.161
48Cadmium106Cd
108Cd
110Cd
111Cd
112Cd
113Cd
114Cd
116Cd
105.906458
107.904183
109.903006
110.904182
111.902757
112.904401
113.903358
115.904755
1.25
0.89
12.49
12.80
24.13
12.22
28.73
7.49
49Indium113In
115In
112.904061
114.903878
4.29
95.71
50Tin112Sn
114Sn
115Sn
116Sn
117Sn
118Sn
119Sn
120Sn
122Sn
124Sn
111.904821
113.902782
114.903346
115.901744
116.902954
117.901606
118.903309
119.902197
121.903440
123.905275
0.97
0.66
0.34
14.54
7.68
24.22
8.59
32.58
4.63
5.79
51Antimony121Sb
123Sb
120.903818
122.904216
57.21
42.79
52Tellurium120Te
122Te
123Te
124Te
125Te
126Te
128Te
130Te
119.904020
121.903047
122.904273
123.902819
124.904425
125.903306
127.904461
129.906223
0.09
2.55
0.89
4.74
7.07
18.84
31.74
34.08
53Iodine127I126.904468100
54Xenon124Xe
126Xe
128Xe
129Xe
130Xe
131Xe
132Xe
134Xe
136Xe
123.905896
125.904269
127.903530
128.904779
129.903508
130.905082
131.904154
133.905395
135.907220
0.09
0.09
1.92
26.44
4.08
21.18
26.89
10.44
8.87
55Cesium133Cs132.905447100
56Barium130Ba
132Ba
134Ba
135Ba
136Ba
137Ba
138Ba
129.906310
131.905056
133.904503
134.905683
135.904570
136.905821
137.905241
0.106
0.101
2.417
6.592
7.854
11.232
71.698
57Lanthanum138La
139La
137.907107
138.906348
0.090
99.910
58Cerium136Ce
138Ce
140Ce
142Ce
135.907144
137.905986
139.905434
141.909240
0.185
0.251
88.450
11.114
59Praseodymium141Pr140.907648100
60Neodymium142Nd
143Nd
144Nd
145Nd
146Nd
148Nd
150Nd
141.907719
142.909810
143.910083
144.912569
145.913112
147.916889
149.920887
27.2
12.2
23.8
8.3
17.2
5.7
5.6
61Promrthium145Pm144.912744*
62Samarium144Sm
147Sm
148Sm
149Sm
150Sm
152Sm
154Sm
143.911995
146.914893
147.914818
148.917180
149.917271
151.919728
153.922205
3.07
14.99
11.24
13.82
7.38
26.75
22.75
63Europium151Eu
153Eu
150.919846
152.921226
47.81
52.19
64Gadolinium152Gd
154Gd
155Gd
156Gd
157Gd
158Gd
160Gd
151.919788
153.920862
154.922619
155.922120
156.923957
157.924101
159.927051
0.20
2.18
14.80
20.47
15.65
24.84
21.86
65Terbium159Tb158.925343100
66Dysprosium156Dy
158Dy
160Dy
161Dy
162Dy
163Dy
164Dy
155.924278
157.924405
159.925194
160.926930
161.926795
162.928728
163.929171
0.06
0.10
2.34
18.91
25.51
24.90
28.18
67Holmium165Ho164.930319100
68Erbium162Er
164Er
166Er
167Er
168Er
170Er
161.928775
163.929197
165.930290
166.932045
167.932368
169.935460
0.14
1.61
33.61
22.93
26.78
14.93
69Thulium169Tm168.934211100
70Ytterbium168Yb
170Yb
171Yb
172Yb
173Yb
174Yb
176Yb
167.933894
169.934759
170.936322
171.936378
172.938207
173.938858
175.942568
0.13
3.04
14.28
21.83
16.13
31.83
12.76
71Lutetium175Lu
176Lu
174.940768
175.942682
97.41
2.59
72Hafnium174Hf
176Hf
177Hf
178Hf
179Hf
180Hf
173.940040
175.941402
176.943220
177.943698
178.945815
179.946549
0.16
5.26
18.60
27.28
13.62
35.08
73Tantalum180Ta
181Ta
179.947466
180.947996
0.012
99.988
74Tungsten180W
182W
183W
184W
186W
179.946706
181.948206
182.950224
183.950933
185.954362
0.12
26.50
14.31
30.64
28.43
75Rhenium185Re
187Re
184.952956
186.955751
37.40
62.60
76Osmium184Os
186Os
187Os
188Os
189Os
190Os
192Os
183.952491
185.953838
186.955748
187.955836
188.958145
189.958445
191.961479
0.02
1.59
1.96
13.24
16.15
26.26
40.78
77Iridium191Ir
193Ir
190.960591
192.962924
37.3
62.7
78Platinum190Pt
192Pt
194Pt
195Pt
196Pt
198Pt
189.959930
191.961035
193.962664
194.964774
195.964935
197.967876
0.014
0.782
32.967
33.832
25.242
7.163
79Gold197Au196.966552100
80Mercury196Hg
198Hg
199Hg
200Hg
201Hg
202Hg
204Hg
195.965815
197.966752
198.968262
199.968309
200.970285
201.970626
203.973476
0.15
9.97
16.87
23.10
13.18
29.86
6.87
81Thallium203Tl
205Tl
202.972329
204.974412
29.524
70.476
82Lead204Pb
206Pb
207Pb
208Pb
203.973029
205.974449
206.975881
207.976636
1.4
24.1
22.1
52.4
83Bismuth209Bi208.980383100
84Polonium209Po208.982416*
85Astatine210At209.987131*
86Radon222Rn222.017570*
87Francium223Fr223.019731*
88Radium226Ra226.025403*
89Actinium227Ac227.027747*
90Thorium232Th232.038050100
91Protactinium231Pa231.035879100
92Uranium234U
235U
238U
234.040946
235.043923
238.050783
0.0055
0.7200
99.2745
93Neptunium237Np237.048167*
94Plutonium244Pu244.064198*
95Americium243Am243.061373*
96Curium247Cm247.070347*
97Berkelium247Bk247.070299*
98Californium251Cf251.079580*
99Einsteinium252Es252.082972*
100Fermium257Fm257.095099*
101Mendelevium258Md258.098425*
102Nobelium259No259.101024*
103Lawrencium262Lr262.109692*
104Rutherfordium263Rf263.118313*
105Dubnium262Db262.011437*
106Seaborgium266Sg266.012238*
107Bohrium264Bh264.012496*
108Hassium269Hs269.001341*
109Meitnerium268Mt268.001388*
110Ununnilium272Uun272.001463*
111Unununium272Uuu272.001535*
112Ununbium277Uub(277)*
114Ununquadium289Uuq(289)*
116Ununhexium289Uuh(289)*
118Ununoctium293Uuo(293)*

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