Periodic Table Of The Elements
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1Periodic Table of the Elements
1
18
1.00794
+1
4.00260
0
KEY
–1
H
He
1
12.011
–4
Atomic Mass
Selected Oxidation States
1
2
+2
1
C
2
Symbol
Relative atomic masses are based
+4
12
on
C = 12.000
Group
Group
1
2
13
14
15
16
17
18
Note: Mass numbers in parentheses
6
Atomic Number
are mass numbers of the most
+1
+2
+3 12.0111
14.0067
6.941
9.01218
10.81
–4
–3
15.9994
–2 18.998403
–1 20.179
0
–2
Electron Configuration
2-4
Li
Be
B
C
+2
N
O
F
Ne
stable or common isotope.
–1
+4
2
+1
+2
3
4
5
6
7
+3
9
8
10
+4
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
+5
22.98977
+1
24.305
+2
26.98154
+3
28.0855
–4
30.97376
–3
35.453
–1
39.948
0
32.06
–2
Al
+2
+3
+1
Na
Mg
Si
P
S
+4
Cl
Ar
3
+5
+4
+6
+3
Group
+5
11
12
13
14
15
16
17
18
+7
3
4
5
7
8
9
10
11
12
6
2-8-3
2-8-1
2-8-2
2-8-4
2-8-5
2-8-6
2-8-7
2-8-8
39.0983
+1
40.08
+2
+3
47.88
72.59
78.96
83.80
44.9559
+2
50.9415
+2
51.996
+2
54.9380
+2
55.847
+2
58.9332
+2
58.69
+2
63.546
+1
65.39
+2 69.72
+3
–4
74.9216
–3
–2
79.904
–1
0
K
Ca
Sc
Ti
+3
V
+3
Cr
+3
Mn
+3
Fe
+3
Co
+3
Ni
+3
Cu
+2
Zn
Ga
Ge
+2
As
+3
Se
+4
Br
+1
Kr
+2
+4
+4
+6
+4
+4
+5
+6
+5
4
+5
+7
19
20
21
22
26
28
30
31
32
33
34
35
36
23
24
25
27
29
2-8-8-1
2-8-8-2
2-8-9-2
2-8-10-2
2-8-11-2
2-8-13-1
2-8-13-2
2-8-14-2
2-8-15-2
2-8-16-2
2-8-18-1
2-8-18-2
2-8-18-3
2-8-18-4
2-8-18-5
2-8-18-6
2-8-18-7
2-8-18-8
85.4678
+1
87.62
+2
88.9059
+3
91.224
+4
92.9064
+3
95.94
+3
(98)
101.07
+3
102.906
+3
106.42
+2
107.868
112.41
+2 114.82
+3
118.71
+2
121.75
–3
127.60
–2
126.905
131.29
+4
+1
–1
0
Zr
Nb
+5
Mo
+6
Ru
Pd
+4
+4
+3
Te
+4
Rb
Sr
Y
Tc
+6
Rh
Ag
Cd
In
Sn
Sb
l
+1
Xe
+2
+5
+6
+7
+5
+4
5
+7
+6
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
2-8-18-10-2
2-8-18-12-1
2-8-18-13-1
2-8-18-15-1
2-8-18-18
2-8-18-18-6
2-8-18-8-1
2-8-18-8-2
2-8-18-9-2
2-8-18-14-1
2-8-18-16-1
2-8-18-18-1
2-8-18-18-2
2-8-18-18-3
2-8-18-18-4
2-8-18-18-5
2-8-18-18-7
2-8-18-18-8
132.905
+1
137.33
+2
138.906
+3 178.49
+4
180.948
+5
(222)
0
183.85
+6
186.207
+4
190.2
+3
192.22
+3
195.08
+2
196.967
+1
200.59
+1
204.383
+1
207.2
+2
208.980
+3
(209)
+2
(210)
Cs
Ba
La
Hf
Ta
W
Re
+6
Os
+4
Ir
+4
Pt
+4
Au
+3
Hg
+2
Tl
+3
Pb
+4
Bi
+5
Po
+4
At
Rn
6
+7
55
56
57
72
73
74
75
76
77
78
79
80
81
82
83
85
86
84
2-8-18-18-8-1
2-8-18-18-8-2
2-8-18-18-9-2
**18-32-10-2
-18-32-11-2
-18-32-12-2
-18-32-13-2
-18-32-14-2
-18-32-15-2
-18-32-17-1
-18-32-18-1
-18-32-18-2
-18-32-18-3
-18-32-18-4
-18-32-18-5
-18-32-18-6
-18-32-18-7
-18-32-18-8
(223)
+1 226.025
+2 227.028
+3 (261)
(262)
(263)
(264)
(265)
(268)
(269)
(272)
(277)
(285)
Fr
Ra
Ac
Rf
Db
Sg
Bh
Hs
Mt
Uun
Uuu
Uub
Uuq
7
87
88
89
104
105
106
107
108
109
111
112
114
-18-32-18-8-1
-18-32-18-8-2
-18-32-18-9-2
*The systematic names and symbols for elements of atomic numbers above 109
will be used until the approval of trivial names by IUPAC.
**Denotes the presence of (2-8-)
for elements 72 and above
140.908
+3
144.24
(145)
150.36
157.25
158.925
162.50
+3
167.26
168.934
173.04
+2
174.967
+3
140.12
+3
+3
+3
+2
151.96
+2
+3
+3
164.930
+3
+3
+3
Ce
+4
Pr
Nd
Pm
Sm
+3
Eu
+3
Gd
Tb
Dy
Ho
Er
Tm
Yb
+3
Lu
58
59
60
61
62
63
64
65
66
67
68
69
70
71
(258)
232.038
+4 231.036
+4
238.029
+3
237.048
+3
(244)
+3
(243)
+3
(247)
+3 (247)
+3
(251)
+3 (252)
(257)
(259)
(260)
Th
Pa
+5
U
+4
Np
+4
Pu
+4
Am
+4
Cm
Bk
+4
Cf
Es
Fm
Md
No
Lr
+5
+5
+5
+5
+6
+6
+6
+6
91
92
93
94
95
96
97
98
99
100
101
103
90
102
8
9
Reference Tables for Physical Setting/ CHEMISTRY
Reference Tables for Physical Setting/ CHEMISTRY
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