"Table of Elements, Atomic Weight Chart"

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APP19 table of elements.qxd
8/13/05
1:52 PM
Page APP 114
TABLE OF ELEMENTS AND THEIR ATOMIC WEIGHTS
Atomic
Atomic
Atomic
Atomic
Element
Symbol
Number
Weight
Element
Symbol
Number
Weight
Actinium
Ac
89
227.0278*
Neodymium
Nd
60
144.24
Aluminum
Al
13
26.981539
Neon
Ne
10
20.1797
Americium
Am
95
243.0614*
Neptunium
Np
93
237.0482*
Antimony
Sb
51
121.760
Nickel
Ni
28
58.6934
Argon
Ar
18
39.948
Niobium
Nb
41
92.90638
Arsenic
As
33
74.92159
Nitrogen
N
7
14.00674
Astatine
At
85
209.9871*
Nobelium
No
102
259.1009*
Barium
Ba
56
137.327
Osmium
Os
76
190.23
Berkelium
Bk
97
247.0703*
Oxygen
O
8
15.9994
Beryllium
Be
4
9.012182
Palladium
Pd
46
106.42
Bismuth
Bi
83
208.98037
Phosphorus
P
15
30.973762
Boron
B
5
10.811
Platinum
Pt
78
195.08
Bromine
Br
35
79.904
Plutonium
Pu
94
244.0642*
Cadmium
Cd
48
112.411
Polonium
Po
84
208.9824*
Calcium
Ca
20
40.078
Potassium
K
19
39.0983
Californium
Cf
98
251.0796*
Praseodymium
Pr
59
140.90765
Carbon
C
6
12.011
Promethium
Pm
61
144.9127*
Cerium
Ce
58
140.115
Protactinium
Pa
91
231.0388*
Cesium
Cs
55
132.90543
Radium
Ra
88
226.0254*
Chlorine
Cl
17
35.4527
Radon
Rn
86
222.0176*
Chromium
Cr
24
51.9961
Rhenium
Re
75
186.207
Cobalt
Co
27
58.93320
Rhodium
Rh
45
102.90550
Copper
Cu
29
63.546
Rubidium
Rb
37
85.4678
Curium
Cm
96
247.0703*
Ruthenium
Ru
44
101.07
Dysprosium
Dy
66
162.50
Samarium
Sm
62
150.36
Einsteinium
Es
99
252.083*
Scandium
Sc
21
44.955910
Erbium
Er
68
167.26
Selenium
Se
34
78.96
Europium
Eu
63
151.965
Silicon
Si
14
28.0855
Fermium
Fm
100
257.0951*
Silver
Ag
47
107.8682
Fluorine
F
9
18.9984032
Sodium
Na
11
22.989768
Francium
Fr
87
223.0197*
Strontium
Sr
38
87.62
Gadolinium
Gd
64
157.25
Sulfur
S
16
32.066
Gallium
Ga
31
69.723
Tantalum
Ta
73
180.9479
Germanium
Ge
32
72.61
Technetium
Tc
43
97.9072*
Gold
Au
79
196.96654
Tellurium
Te
52
127.60
Hafnium
Hf
72
178.49
Terbium
Tb
65
158.92534
Helium
He
2
4.002602
Thallium
Tl
81
204.3833
Holmium
Ho
67
164.93032
Thorium
Th
90
232.0381
Hydrogen
H
1
1.00794
Thulium
Tm
69
168.93421
Indium
In
49
114.818
Tin
Sn
50
118.710
Iodine
I
53
126.90447
Titanium
Ti
22
47.867
Iridium
Ir
77
192.217
Tungsten
W
74
183.84
Iron
Fe
26
55.845
Unnilquadium
Unq
104
261.11*
Krypton
Kr
36
83.80
Unnilpentium
Unp
105
262.114*
Lanthanum
La
57
138.9055
Unnilhexium
Unh
106
263.118*
Lawrencium
Lr
103
262.11*
Unnilseptium
Uns
107
262.12*
Lead
Pb
82
207.2
Uranium
U
92
238.0289
Lithium
Li
3
6.941
Vanadium
V
23
50.9415
Lutetium
Lu
71
174.967
Xenon
Xe
54
131.29
Magnesium
Mg
12
24.3050
Ytterbium
Yb
70
173.04
Manganese
Mn
25
54.93805
Yttrium
Y
39
88.90585
Mendelevium
Md
101
258.10*
Zinc
Zn
30
65.39
Mercury
Hg
80
200.59
Zirconium
Zr
40
91.224
Molybdenum
Mo
42
95.94
Based on 1993 IUPAC Table of Standard Atomic Weights of the Elements.
* Relative atomic mass of the isotope of that element with the longest known half-life.
APP 114
APP19 table of elements.qxd
8/13/05
1:52 PM
Page APP 114
TABLE OF ELEMENTS AND THEIR ATOMIC WEIGHTS
Atomic
Atomic
Atomic
Atomic
Element
Symbol
Number
Weight
Element
Symbol
Number
Weight
Actinium
Ac
89
227.0278*
Neodymium
Nd
60
144.24
Aluminum
Al
13
26.981539
Neon
Ne
10
20.1797
Americium
Am
95
243.0614*
Neptunium
Np
93
237.0482*
Antimony
Sb
51
121.760
Nickel
Ni
28
58.6934
Argon
Ar
18
39.948
Niobium
Nb
41
92.90638
Arsenic
As
33
74.92159
Nitrogen
N
7
14.00674
Astatine
At
85
209.9871*
Nobelium
No
102
259.1009*
Barium
Ba
56
137.327
Osmium
Os
76
190.23
Berkelium
Bk
97
247.0703*
Oxygen
O
8
15.9994
Beryllium
Be
4
9.012182
Palladium
Pd
46
106.42
Bismuth
Bi
83
208.98037
Phosphorus
P
15
30.973762
Boron
B
5
10.811
Platinum
Pt
78
195.08
Bromine
Br
35
79.904
Plutonium
Pu
94
244.0642*
Cadmium
Cd
48
112.411
Polonium
Po
84
208.9824*
Calcium
Ca
20
40.078
Potassium
K
19
39.0983
Californium
Cf
98
251.0796*
Praseodymium
Pr
59
140.90765
Carbon
C
6
12.011
Promethium
Pm
61
144.9127*
Cerium
Ce
58
140.115
Protactinium
Pa
91
231.0388*
Cesium
Cs
55
132.90543
Radium
Ra
88
226.0254*
Chlorine
Cl
17
35.4527
Radon
Rn
86
222.0176*
Chromium
Cr
24
51.9961
Rhenium
Re
75
186.207
Cobalt
Co
27
58.93320
Rhodium
Rh
45
102.90550
Copper
Cu
29
63.546
Rubidium
Rb
37
85.4678
Curium
Cm
96
247.0703*
Ruthenium
Ru
44
101.07
Dysprosium
Dy
66
162.50
Samarium
Sm
62
150.36
Einsteinium
Es
99
252.083*
Scandium
Sc
21
44.955910
Erbium
Er
68
167.26
Selenium
Se
34
78.96
Europium
Eu
63
151.965
Silicon
Si
14
28.0855
Fermium
Fm
100
257.0951*
Silver
Ag
47
107.8682
Fluorine
F
9
18.9984032
Sodium
Na
11
22.989768
Francium
Fr
87
223.0197*
Strontium
Sr
38
87.62
Gadolinium
Gd
64
157.25
Sulfur
S
16
32.066
Gallium
Ga
31
69.723
Tantalum
Ta
73
180.9479
Germanium
Ge
32
72.61
Technetium
Tc
43
97.9072*
Gold
Au
79
196.96654
Tellurium
Te
52
127.60
Hafnium
Hf
72
178.49
Terbium
Tb
65
158.92534
Helium
He
2
4.002602
Thallium
Tl
81
204.3833
Holmium
Ho
67
164.93032
Thorium
Th
90
232.0381
Hydrogen
H
1
1.00794
Thulium
Tm
69
168.93421
Indium
In
49
114.818
Tin
Sn
50
118.710
Iodine
I
53
126.90447
Titanium
Ti
22
47.867
Iridium
Ir
77
192.217
Tungsten
W
74
183.84
Iron
Fe
26
55.845
Unnilquadium
Unq
104
261.11*
Krypton
Kr
36
83.80
Unnilpentium
Unp
105
262.114*
Lanthanum
La
57
138.9055
Unnilhexium
Unh
106
263.118*
Lawrencium
Lr
103
262.11*
Unnilseptium
Uns
107
262.12*
Lead
Pb
82
207.2
Uranium
U
92
238.0289
Lithium
Li
3
6.941
Vanadium
V
23
50.9415
Lutetium
Lu
71
174.967
Xenon
Xe
54
131.29
Magnesium
Mg
12
24.3050
Ytterbium
Yb
70
173.04
Manganese
Mn
25
54.93805
Yttrium
Y
39
88.90585
Mendelevium
Md
101
258.10*
Zinc
Zn
30
65.39
Mercury
Hg
80
200.59
Zirconium
Zr
40
91.224
Molybdenum
Mo
42
95.94
Based on 1993 IUPAC Table of Standard Atomic Weights of the Elements.
* Relative atomic mass of the isotope of that element with the longest known half-life.
APP 114
APP19 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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