Periodic Table of the Elements
1
1
18
2
H
Hydrogen
1.008
3
Li
Lithium
6.941
11
Na
Sodium
22.990
19
K
Potassium
39.098
37
Rb
Rubidium
84.468
55
Cs
Cesium
132.905
87
Fr
Francium
223.020
2
4
13
5
Be
Beryllium
9.012
Mg
Ca
38
Sr
Strontium
87.62
56
Ba
Barium
137.328
88
Ra
Radium
226.025
B
4
21
22
Sc
Scandium
44.956
39
5
23
Ti
Titanium
47.867
Y
Zr
Nb
73
Hf
Lanthanides
Ta
Hafnium
178.49
89-103
104
Db
[261]
57
La
Lanthanum
138.905
89
Ac
Actinium
227.028
58
Ce
Cerium
140.116
90
Th
Thorium
232.038
Manganese
54.938
42
43
9
26
Mn
Fe
45
Ru
Ruthenium
101.07
74
76
75
Re
59
Pr
Osmium
190.23
107
Sg
Bh
Hs
91
Pa
Protactinium
231.036
144.243
92
U
Uranium
238.029
144.913
93
Np
Neptunium
237.048
Cadmium
112.414
79
Pt
Mercury
200.592
111
Ds
81
Hg
Gold
196.967
In
112
Tl
Pb
Lead
207.2
Fl
62
Samarium
150.36
94
Pu
Plutonium
244.064
63
Eu
Europium
151.964
95
64
Gd
Gadolinium
157.25
96
Am Cm
Americium
243.061
Curium
247.070
65
Tb
Terbium
158.925
97
Bk
Berkelium
247.070
66
Dy
Dysprosium
162.500
Flerovium
[289]
67
Ho
Holmium
164.930
98
99
Californium
251.080
Einsteinium
[254]
Cf
Es
36
Kr
Br
53
Krypton
84.798
54
Xe
I
Iodine
126.904
Xenon
131.249
85
84
Po
86
Rn
At
Polonium
[208.982]
115
Argon
39.948
Bromine
79.904
Te
Bi
Ar
35
Tellurium
127.6
Bismuth
208.980
114
113
Cn Uut
Rg
83
82
18
Cl
52
Antimony
121.760
Neon
20.180
Chlorine
35.453
Se
Sb
Tin
118.711
S
Selenium
78.971
51
Ne
F
17
34
As
10
Fluorine
18.998
Sulfur
32.066
Arsenic
74.922
Sn
Thallium
204.383
P
33
50
Indium
114.818
80
Au
110
Mt
Cd
Silver
107.868
Platinum
195.085
49
9
O
16
Helium
4.003
17
Oxygen
15.999
Phosphorus
30.974
Germanium
72.631
Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium
[268]
[269]
[272]
[277]
unknown
Nd Pm Sm
Praseodymium Neodymium Promethium
140.908
Ir
48
Ag
78
109
Hassium
[269]
61
Pd
Palladium
106.42
Iridium
192.217
108
Bohrium
[264]
60
77
Os
Rhenium
186.207
Seaborgium
[266]
Rh
47
Si
Ge
Gallium
69.723
8
N
15
32
Ga
Zinc
65.38
16
Nitrogen
14.007
Silicon
28.086
31
Zn
Copper
63.546
46
Rhodium
102.906
30
Cu
Nickel
58.693
Aluminum
26.982
12
29
Ni
Cobalt
58.933
44
11
28
Co
Iron
55.845
Tc
10
27
Molibdenum Technetium
95.95
98.907
106
Dubnium
[262]
Rutherfordium
Chromium
51.996
Tungsten
183.84
105
Rf
Actinides
25
W
Tantalum
180.948
8
24
Mo
Niobium
92.906
72
7
Cr
41
Zirconium
91.224
57-71
V
Vanadium
50.942
40
Yttrium
88.906
6
7
C
14
Al
3
15
Carbon
12.011
13
Magnesium
24.305
Calcium
40.078
6
Boron
10.811
12
20
14
Astatine
209.987
116
He
Radon
222.018
117
118
Uus Uuo
Uup Lv
Ununpentium Livermorium Ununseptium Ununoctium
unknown
[298]
unknown
unknown
68
Er
Erbium
167.259
100
69
Tm
Thulium
168.934
101
Fm Md
Fermium
257.095
Mendelevium
258.1
70
Yb
Ytterbium
173.055
102
No
Nobelium
259.101
71
Lu
Lutetium
174.967
103
Lr
Lawrencium
[262]
©2015 Todd Helmenstine
sciencenotes.org