Table Of Elements And Their Atomic Weights Page 2
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2APP19 table of elements.qxd
8/13/05
1:52 PM
Page APP 115
APP 115
TABLE OF ELEMENTS
Atomic
Atomic
Atomic
Atomic
Number
Element
Symbol
Weight
Number
Element
Symbol
Weight
1
Hydrogen
H
1.00794
55
Cesium
Cs
132.90543
2
Helium
He
4.002602
56
Barium
Ba
137.327
3
Lithium
Li
6.941
57
Lanthanum
La
138.9055
4
Beryllium
Be
9.012182
58
Cerium
Ce
140.115
5
Boron
B
10.811
59
Praseodymium
Pr
140.90765
6
Carbon
C
12.011
60
Neodymium
Nd
144.24
7
Nitrogen
N
14.00674
61
Promethium
Pm
144.9127*
8
Oxygen
O
15.9994
62
Samarium
Sm
150.36
9
Fluorine
F
18.9984032
63
Europium
Eu
151.965
10
Neon
Ne
20.1797
64
Gadolinium
Gd
157.25
11
Sodium
Na
22.989768
65
Terbium
Tb
158.92534
12
Magnesium
Mg
24.3050
66
Dysprosium
Dy
162.50
13
Aluminum
Al
26.981539
67
Holmium
Ho
164.93032
14
Silicon
Si
28.0855
68
Erbium
Er
167.26
15
Phosphorus
P
30.973762
69
Thulium
Tm
168.93421
16
Sulfur
S
32.066
70
Ytterbium
Yb
173.04
17
Chlorine
Cl
35.4527
71
Lutetium
Lu
174.967
18
Argon
Ar
39.948
72
Hafnium
Hf
178.49
19
Potassium
K
39.0983
73
Tantalum
Ta
180.9479
20
Calcium
Ca
40.078
74
Tungsten
W
183.84
21
Scandlum
Sc
44.955910
75
Rhenium
Re
186.207
22
Titanium
Ti
47.867
76
Osmium
Os
190.23
23
Vanadium
V
50.9415
77
Iridium
Ir
192.217
24
Chromium
Cr
51.9961
78
Platinum
Pt
195.08
25
Manganese
Mn
54.93805
79
Gold
Au
196.96654
26
Iron
Fe
55.845
80
Mercury
Hg
200.59
27
Cobalt
Co
58.93320
81
Thallium
Tl
204.3833
28
Nickel
Ni
58.6934
82
Lead
Pb
207.2
29
Copper
Cu
63.546
83
Bismuth
Bi
208.98037
30
Zinc
Zn
65.39
84
Polonium
Po
208.9824*
31
Gallium
Ga
69.723
85
Astatine
At
209.9871*
32
Germanium
Ge
72.61
86
Radon
Rn
222.0176*
33
Arsenic
As
74.92159
87
Francium
Fr
223.0197*
34
Selenium
Se
78.96
88
Radium
Ra
226.0254*
35
Bromine
Br
79.904
89
Actinium
Ac
227.0278*
36
Krypton
Kr
83.80
90
Thorium
Th
232.0381*
37
Rubidium
Rb
85.4678
91
Protactinium
Pa
231.0388*
38
Strontium
Sr
87.62
92
Uranium
U
238.0289
39
Yttrium
Y
88.90585
93
Neptunium
Np
237.0482*
40
Zirconium
Zr
91.224
94
Plutonium
Pu
244.0642*
41
Niobium
Nb
92.90638
95
Americium
Am
243.0614*
42
Molybdenum
Mo
95.94
96
Curium
Cm
247.0703*
43
Technetium
Te
97.9072*
97
Berkelium
Bk
247.0703*
44
Ruthenium
Ru
101.07
98
Californium
Cf
251.0796*
45
Rhodium
Rh
102.90550
99
Einsteinium
Es
252.083*
46
Palladium
Pd
106.42
100
Fermium
Fm
257.0951*
47
Silver
Ag
107.8682
101
Mendelevium
Md
258.10*
48
Cadmium
Cd
112.411
102
Nobelium
No
259.1009*
49
Indium
In
114.818
103
Lawrencium
Lr
262.11*
50
Tin
Sn
118.710
104
Unnilquadium
Unq
261.11*
51
Antimony
Sb
121.760
105
Unnilpentium
Unp
262.114*
52
Tellurium
Te
127.60
106
Unnilhexium
Unh
263.118*
53
Iodine
I
126.90447
107
Unnilseptium
Uns
262.12*
54
Xenon
Xe
131.29
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