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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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Periodic table

  • 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 Praseodymium