This document is a periodic table of elements that lists the atomic number, name, atomic weight, and symbol of each element. It arranges the 118 known elements in increasing atomic number and groups elements with similar properties, with metals on the left, nonmetals on the right, and noble gases and actinoids below the main body of the table. Elements that do not have stable isotopes are given with the mass number of the longest-lived isotope in parentheses.

1. Periodic Table of Elements
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1
1
Hydrogen
1.00794
H
1
Atomic #
Name
Atomic Weight
Symbol
C Solid
Hg Liquid
H Gas
Rf Unknown
Metals Nonmetals
Alkalimetals
Alkaline
earthmetals
Lanthanoids
Transition
metals
Poormetals
Other
nonmetals
Noblegases
Actinoids
2
Helium
4.002602
He
2 K
2
3
Lithium
6.941
Li
2
1 4
Beryllium
9.012182
Be
2
2 5
Boron
10.811
B
2
3 6
Carbon
12.0107
C
2
4 7
Nitrogen
14.0067
N
2
5 8
Oxygen
15.9994
O
2
6 9
Fluorine
18.9984032
F
2
7 10
Neon
20.1797
Ne
2
8
K
L
3
11
Sodium
22.98976928
Na
2
8
1
12
Magnesium
24.3050
Mg
2
8
2
13
Aluminium
26.9815386
Al
2
8
3
14
Silicon
28.0855
Si
2
8
4
15
Phosphorus
30.973762
P
2
8
5
16
Sulfur
32.065
S
2
8
6
17
Chlorine
35.453
Cl
2
8
7
18
Argon
39.948
Ar
2
8
8
K
L
M
4
19
Potassium
39.0983
K
2
8
8
1
20
Calcium
40.078
Ca
2
8
8
2
21
Scandium
44.955912
Sc
2
8
9
2
22
Titanium
47.867
Ti
2
8
10
2
23
Vanadium
50.9415
V
2
8
11
2
24
Chromium
51.9961
Cr
2
8
13
1
25
Manganese
54.938045
Mn
2
8
13
2
26
Iron
55.845
Fe
2
8
14
2
27
Cobalt
58.933195
Co
2
8
15
2
28
Nickel
58.6934
Ni
2
8
16
2
29
Copper
63.546
Cu
2
8
18
1
30
Zinc
65.38
Zn
2
8
18
2
31
Gallium
69.723
Ga
2
8
18
3
32
Germanium
72.63
Ge
2
8
18
4
33
Arsenic
74.92160
As
2
8
18
5
34
Selenium
78.96
Se
2
8
18
6
35
Bromine
79.904
Br
2
8
18
7
36
Krypton
83.798
Kr
2
8
18
8
K
L
M
N
5
37
Rubidium
85.4678
Rb
2
8
18
8
1
38
Strontium
87.62
Sr
2
8
18
8
2
39
Yttrium
88.90585
Y
2
8
18
9
2
40
Zirconium
91.224
Zr
2
8
18
10
2
41
Niobium
92.90638
Nb
2
8
18
12
1
42
Molybdenum
95.96
Mo
2
8
18
13
1
43
Technetium
(97.9072)
Tc
2
8
18
14
1
44
Ruthenium
101.07
Ru
2
8
18
15
1
45
Rhodium
102.90550
Rh
2
8
18
16
1
46
Palladium
106.42
Pd
2
8
18
18
0
47
Silver
107.8682
Ag
2
8
18
18
1
48
Cadmium
112.411
Cd
2
8
18
18
2
49
Indium
114.818
In
2
8
18
18
3
50
Tin
118.710
Sn
2
8
18
18
4
51
Antimony
121.760
Sb
2
8
18
18
5
52
Tellurium
127.60
Te
2
8
18
18
6
53
Iodine
126.90447
I
2
8
18
18
7
54
Xenon
131.293
Xe
2
8
18
18
8
K
L
M
N
O
6
55
Caesium
132.9054519
Cs
2
8
18
18
8
1
56
Barium
137.327
Ba
2
8
18
18
8
2
57–71
72
Hafnium
178.49
Hf
2
8
18
32
10
2
73
Tantalum
180.94788
Ta
2
8
18
32
11
2
74
Tungsten
183.84
W
2
8
18
32
12
2
75
Rhenium
186.207
Re
2
8
18
32
13
2
76
Osmium
190.23
Os
2
8
18
32
14
2
77
Iridium
192.217
Ir
2
8
18
32
15
2
78
Platinum
195.084
Pt
2
8
18
32
17
1
79
Gold
196.966569
Au
2
8
18
32
18
1
80
Mercury
200.59
Hg
2
8
18
32
18
2
81
Thallium
204.3833
Tl
2
8
18
32
18
3
82
Lead
207.2
Pb
2
8
18
32
18
4
83
Bismuth
208.98040
Bi
2
8
18
32
18
5
84
Polonium
(208.9824)
Po
2
8
18
32
18
6
85
Astatine
(209.9871)
At
2
8
18
32
18
7
86
Radon
(222.0176)
Rn
2
8
18
32
18
8
K
L
M
N
O
P
7
87
Francium
(223)
Fr
2
8
18
32
18
8
1
88
Radium
(226)
Ra
2
8
18
32
18
8
2
89–103
104
Rutherfordium
(261)
Rf
2
8
18
32
32
10
2
105
Dubnium
(262)
Db
2
8
18
32
32
11
2
106
Seaborgium
(266)
Sg
2
8
18
32
32
12
2
107
Bohrium
(264)
Bh
2
8
18
32
32
13
2
108
Hassium
(277)
Hs
2
8
18
32
32
14
2
109
Meitnerium
(268)
Mt
2
8
18
32
32
15
2
110
Darmstadtium
(271)
Ds
2
8
18
32
32
17
1
111
Roentgenium
(272)
Rg
2
8
18
32
32
18
1
112
Copernicium
(285)
Cn
2
8
18
32
32
18
2
113
Ununtrium
(284)
Uut
2
8
18
32
32
18
3
114
Flerovium
(289)
Fl
2
8
18
32
32
18
4
115
Ununpentium
(288)
Uup
2
8
18
32
32
18
5
116
Livermorium
(292)
Lv
2
8
18
32
32
18
6
117
Ununseptium
Uus
118
Ununoctium
(294)
Uuo
2
8
18
32
32
18
8
K
L
M
N
O
P
Q
For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses.
Periodic Table Design and Interface Copyright © 1997 Michael Dayah. http://www.ptable.com/ Last updated: May 9, 2013
57
Lanthanum
138.90547
La
2
8
18
18
9
2
58
Cerium
140.116
Ce
2
8
18
19
9
2
59
140.90765
Pr
2
8
18
21
8
2
60
Neodymium
144.242
Nd
2
8
18
22
8
2
61
Promethium
(145)
Pm
2
8
18
23
8
2
62
Samarium
150.36
Sm
2
8
18
24
8
2
63
Europium
151.964
Eu
2
8
18
25
8
2
64
Gadolinium
157.25
Gd
2
8
18
25
9
2
65
Terbium
158.92535
Tb
2
8
18
27
8
2
66
Dysprosium
162.500
Dy
2
8
18
28
8
2
67
Holmium
164.93032
Ho
2
8
18
29
8
2
68
Erbium
167.259
Er
2
8
18
30
8
2
69
Thulium
168.93421
Tm
2
8
18
31
8
2
70
Ytterbium
173.054
Yb
2
8
18
32
8
2
71
Lutetium
174.9668
Lu
2
8
18
32
9
2
89
Actinium
(227)
Ac
2
8
18
32
18
9
2
90
Thorium
232.03806
Th
2
8
18
32
18
10
2
91
Protactinium
231.03588
Pa
2
8
18
32
20
9
2
92
Uranium
238.02891
U
2
8
18
32
21
9
2
93
Neptunium
(237)
Np
2
8
18
32
22
9
2
94
Plutonium
(244)
Pu
2
8
18
32
24
8
2
95
Americium
(243)
Am
2
8
18
32
25
8
2
96
Curium
(247)
Cm
2
8
18
32
25
9
2
97
Berkelium
(247)
Bk
2
8
18
32
27
8
2
98
Californium
(251)
Cf
2
8
18
32
28
8
2
99
Einsteinium
(252)
Es
2
8
18
32
29
8
2
100
Fermium
(257)
Fm
2
8
18
32
30
8
2
101
Mendelevium
(258)
Md
2
8
18
32
31
8
2
102
Nobelium
(259)
No
2
8
18
32
32
8
2
103
Lawrencium
(262)
Lr
2
8
18
32
32
9
2
Michael Dayah For a fully interactive experience, visit www.ptable.com. michael@dayah.com
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