Periodic Table of Elements

Wikipedia Properties Orbitals Isotopes
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 1 H Hydrogen
1.00794
1 Atomic # Symbol Name
Atomic Mass
C Solid
Hg Liquid
H Gas
Rf Unknown
Metals Nonmetals
Alkali metals Alkaline earth metals Lanthanoids Transition metals Poor metals Other nonmetals Noble gases
Actinoids
Kelvin
°Celsius
°Fahrenheit
7s ↑↓
6s ↑↓
5s ↑↓
4s ↑↓
3s ↑↓
2s ↑↓
1s ↑↓
7p ↑↓↑↓↑↓
6p ↑↓↑↓↑↓
5p ↑↓↑↓↑↓
4p ↑↓↑↓↑↓
3p ↑↓↑↓↑↓
2p ↑↓↑↓↑↓
6d ↑↓↑↓↑↓↑↓↑↓
5d ↑↓↑↓↑↓↑↓↑↓
4d ↑↓↑↓↑↓↑↓↑↓
3d ↑↓↑↓↑↓↑↓↑↓
l=
m=
n=
5f ↑↓↑↓↑↓↑↓↑↓↑↓↑↓
4f ↑↓↑↓↑↓↑↓↑↓↑↓↑↓
s
p
d
f
α Alpha decay β Beta decay
p Proton emission β+ Beta+ decay
n Neutron emission EC Electron capture
SF Spontaneous fission  
 Stable
2 He Helium
4.002602
2 K
2 3 Li Lithium
6.941
2
1		 4 Be Beryllium
9.012182
2
2		 5 B Boron
10.811
2
3		 6 C Carbon
12.0107
2
4		 7 N Nitrogen
14.0067
2
5		 8 O Oxygen
15.9994
2
6		 9 F Fluorine
18.9984032
2
7		 10 Ne Neon
20.1797
2
8		 K
L
3 11 Na Sodium
22.98976928
2
8
1		 12 Mg Magnesium
24.3050
2
8
2		 13 Al Aluminium
26.9815386
2
8
3		 14 Si Silicon
28.0855
2
8
4		 15 P Phosphorus
30.973762
2
8
5		 16 S Sulfur
32.065
2
8
6		 17 Cl Chlorine
35.453
2
8
7		 18 Ar Argon
39.948
2
8
8		 K
L
M
4 19 K Potassium
39.0983
2
8
8
1		 20 Ca Calcium
40.078
2
8
8
2		 21 Sc Scandium
44.955912
2
8
9
2		 22 Ti Titanium
47.867
2
8
10
2		 23 V Vanadium
50.9415
2
8
11
2		 24 Cr Chromium
51.9961
2
8
13
1		 25 Mn Manganese
54.938045
2
8
13
2		 26 Fe Iron
55.845
2
8
14
2		 27 Co Cobalt
58.933195
2
8
15
2		 28 Ni Nickel
58.6934
2
8
16
2		 29 Cu Copper
63.546
2
8
18
1		 30 Zn Zinc
65.38
2
8
18
2		 31 Ga Gallium
69.723
2
8
18
3		 32 Ge Germanium
72.64
2
8
18
4		 33 As Arsenic
74.92160
2
8
18
5		 34 Se Selenium
78.96
2
8
18
6		 35 Br Bromine
79.904
2
8
18
7		 36 Kr Krypton
83.798
2
8
18
8		 K
L
M
N
5 37 Rb Rubidium
85.4678
2
8
18
8
1		 38 Sr Strontium
87.62
2
8
18
8
2		 39 Y Yttrium
88.90585
2
8
18
9
2		 40 Zr Zirconium
91.224
2
8
18
10
2		 41 Nb Niobium
92.90638
2
8
18
12
1		 42 Mo Molybdenum
95.96
2
8
18
13
1		 43 Tc Technetium
(98)
2
8
18
14
1		 44 Ru Ruthenium
101.07
2
8
18
15
1		 45 Rh Rhodium
102.90550
2
8
18
16
1		 46 Pd Palladium
106.42
2
8
18
18
0		 47 Ag Silver
107.8682
2
8
18
18
1		 48 Cd Cadmium
112.411
2
8
18
18
2		 49 In Indium
114.818
2
8
18
18
3		 50 Sn Tin
118.710
2
8
18
18
4		 51 Sb Antimony
121.760
2
8
18
18
5		 52 Te Tellurium
127.60
2
8
18
18
6		 53 I Iodine
126.90447
2
8
18
18
7		 54 Xe Xenon
131.293
2
8
18
18
8		 K
L
M
N
O
6 55 Cs Caesium
132.9054519
2
8
18
18
8
1		 56 Ba Barium
137.327
2
8
18
18
8
2		 57–71 72 Hf Hafnium
178.49
2
8
18
32
10
2		 73 Ta Tantalum
180.94788
2
8
18
32
11
2		 74 W Tungsten
183.84
2
8
18
32
12
2		 75 Re Rhenium
186.207
2
8
18
32
13
2		 76 Os Osmium
190.23
2
8
18
32
14
2		 77 Ir Iridium
192.217
2
8
18
32
15
2		 78 Pt Platinum
195.084
2
8
18
32
17
1		 79 Au Gold
196.966569
2
8
18
32
18
1		 80 Hg Mercury
200.59
2
8
18
32
18
2		 81 Tl Thallium
204.3833
2
8
18
32
18
3		 82 Pb Lead
207.2
2
8
18
32
18
4		 83 Bi Bismuth
208.98040
2
8
18
32
18
5		 84 Po Polonium
(209)
2
8
18
32
18
6		 85 At Astatine
(210)
2
8
18
32
18
7		 86 Rn Radon
(222)
2
8
18
32
18
8		 K
L
M
N
O
P
7 87 Fr Francium
(223)
2
8
18
32
18
8
1		 88 Ra Radium
(226)
2
8
18
32
18
8
2		 89–103 104 Rf Rutherfordium
(267)
2
8
18
32
32
10
2		 105 Db Dubnium
(268)
2
8
18
32
32
11
2		 106 Sg Seaborgium
(271)
2
8
18
32
32
12
2		 107 Bh Bohrium
(272)
2
8
18
32
32
13
2		 108 Hs Hassium
(270)
2
8
18
32
32
14
2		 109 Mt Meitnerium
(276)
2
8
18
32
32
15
2		 110 Ds Darmstadtium
(281)
2
8
18
32
32
17
1		 111 Rg Roentgenium
(280)
2
8
18
32
32
18
1		 112 Uub Ununbium
(285)
2
8
18
32
32
18
2		 113 Uut Ununtrium
(284)
2
8
18
32
32
18
3		 114 Uuq Ununquadium
(289)
2
8
18
32
32
18
4		 115 Uup Ununpentium
(288)
2
8
18
32
32
18
5		 116 Uuh Ununhexium
(293)
2
8
18
32
32
18
6		 117 Uus Ununseptium
 
 118 Uuo Ununoctium
(294)
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: August 19, 2008 
57 La Lanthanum
138.90547
2
8
18
18
9
2		 58 Ce Cerium
140.116
2
8
18
19
9
2		 59 Pr Praseodymium
140.90765
2
8
18
21
8
2		 60 Nd Neodymium
144.242
2
8
18
22
8
2		 61 Pm Promethium
(145)
2
8
18
23
8
2		 62 Sm Samarium
150.36
2
8
18
24
8
2		 63 Eu Europium
151.964
2
8
18
25
8
2		 64 Gd Gadolinium
157.25
2
8
18
25
9
2		 65 Tb Terbium
158.92535
2
8
18
27
8
2		 66 Dy Dysprosium
162.500
2
8
18
28
8
2		 67 Ho Holmium
164.93032
2
8
18
29
8
2		 68 Er Erbium
167.259
2
8
18
30
8
2		 69 Tm Thulium
168.93421
2
8
18
31
8
2		 70 Yb Ytterbium
173.054
2
8
18
32
8
2		 71 Lu Lutetium
174.9668
2
8
18
32
9
2
89 Ac Actinium
(227)
2
8
18
32
18
9
2		 90 Th Thorium
232.03806
2
8
18
32
18
10
2		 91 Pa Protactinium
231.03588
2
8
18
32
20
9
2		 92 U Uranium
238.02891
2
8
18
32
21
9
2		 93 Np Neptunium
(237)
2
8
18
32
22
9
2		 94 Pu Plutonium
(244)
2
8
18
32
24
8
2		 95 Am Americium
(243)
2
8
18
32
25
8
2		 96 Cm Curium
(247)
2
8
18
32
25
9
2		 97 Bk Berkelium
(247)
2
8
18
32
27
8
2		 98 Cf Californium
(251)
2
8
18
32
28
8
2		 99 Es Einsteinium
(252)
2
8
18
32
29
8
2		 100 Fm Fermium
(257)
2
8
18
32
30
8
2		 101 Md Mendelevium
(258)
2
8
18
32
31
8
2		 102 No Nobelium
(259)
2
8
18
32
32
8
2		 103 Lr Lawrencium
(262)
2
8
18
32
32
9
2

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