The periodic table
www.webelements.com
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Hydrogen
18
Helium
1
2
The Periodic Table
H
He
(modified from the periodic table from WebElements.com)
Key:
1.008
Lithium
Beryllium
Element Name
Boron
Carbon
Nitrogen
Oxygen
Fluorine
4.0026
Neon
3
4
Atomic number
5
6
7
8
9
10
Li
Be
Symbol
B
6.94
Sodium
9.0122
Magnesium
Atomic weight (mean relative mass)
11
12
22.990
Potassium
24.305
Calcium
Scandium
Titanium
Vanadium
Chromium
Manganese
Iron
Cobalt
Nickel
Copper
19
20
21
22
23
24
25
26
27
28
Na Mg
K
40.078(4)
Strontium
Ca
Sc
44.956
Yttrium
47.867
Zirconium
50.942
Niobium
51.996
Molybdenum
54.938
Technetium
55.845(2)
Ruthenium
37
38
39
40
41
42
43
Sr
85.468
Caesium
87.62
Barium
55
56
132.91
Francium
137.33
Radium
87
88
Cs Ba
Fr
[223.02]
Ra
[226.03]
12.011
Silicon
14.007
Phosphorus
15.999
Sulfur
18.998
Chlorine
F
Ne
13
14
15
16
17
18
Al
39.098
Rubidium
Rb
10.81
Aluminium
Y
57-70
*
89-102
**
Cr Mn Fe
Ni
S
Cl
20.180
Argon
Ar
Zinc
26.982
Gallium
28.085
Germanium
30.974
Arsenic
32.06
Selenium
35.45
Bromine
39.948
Krypton
29
30
31
32
33
34
35
36
58.933
Rhodium
58.693
Palladium
63.546(3)
Silver
Cu Zn Ga Ge As
65.38(2)
Cadmium
69.723
Indium
72.630(8)
Tin
74.922
Antimony
78.971(8)
Tellurium
Se
Br
79.904
Iodine
83.798(2)
Xenon
44
45
46
47
48
49
50
51
52
53
54
95.95
Tungsten
[98.906]
Rhenium
101.07(2)
Osmium
102.91
Iridium
106.42
Platinum
107.87
Gold
112.41
Mercury
114.82
Thallium
In
Sn
Sb
121.76
Bismuth
127.60(3)
Polonium
126.90
Astatine
I
Xe
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
186.21
Bohrium
190.23(2)
Hassium
192.22
Meitnerium
Hf
103
104
174.97
178.49(2)
Lawrencium Rutherfordium
Lr
Rf
Ta
105
106
107
108
109
[270.13]
[269.13]
[270.13]
[270.13]
[278.16]
Promethium
Samarium
Europium
Db Sg Bh Hs Mt
Lanthanum
Cerium
La
Ce
140.12
Thorium
140.91
Protactinium
89
90
91
[227.03]
Th
232.04
Ir
183.84
Seaborgium
[267.12]
Ac
Re Os
180.95
Dubnium
[262.11]
58
W
Ru Rh Pd Ag Cd
Praseodymium Neodymium
59
Pr
Pa
231.04
60
61
62
63
Pt
Au Hg
195.08
196.97
200.59
Darmstadtium Roentgenium Copernicium
Tl
118.71
Lead
Pb
[208.98]
Livermorium
[209.99]
Tennessine
[222.02]
Oganesson
114
115
116
117
118
[289.19]
[293.20]
Thulium
Ytterbium
113
[281.17]
[281.17]
[285.18]
[286.18]
[289.19]
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Ds Rg Cn Nh
Nd Pm Sm Eu Gd Tb
67
Dy Ho
Fl
68
Mc Lv
69
150.36(2)
Plutonium
151.96
Americium
157.25(3)
Curium
158.93
Berkelium
162.50
Californium
164.93
Einsteinium
167.26
Fermium
168.93
Mendelevium
173.05
Nobelium
92
93
94
95
96
97
98
99
100
101
102
[237.05]
[244.06]
[243.06]
[247.07]
[247.07]
[252.08]
[257.10]
[258.10]
[259.10]
Np Pu Am Cm Bk
Cf
[251.08]
Og
[294.21]
Er Tm Yb
[144.91]
Neptunium
U
Ts
[293.21]
70
144.24
Uranium
238.03
Rn
208.98
Moscovium
112
66
At
207.2
Flerovium
111
65
Po
131.29
Radon
204.38
Nihonium
110
64
Bi
Te
Kr
92.906(2)
Tantalum
Lu
Nb Mo Tc
Co
P
O
91.224(2)
Hafnium
138.91
Actinium
**actinoids
Zr
V
Si
N
88.906
Lutetium
57
*lanthanoids
Ti
C
Es Fm Md No
Symbols and names: the symbols and names of the elements, and their spellings are those recommended by the International Union of Pure and Applied Chemistry (IUPAC - http://www.iupac.org/). In some countries, the spellings aluminum, cesium, and sulphur are usual.
Group labels: the numeric system (1–18) used here is the current IUPAC convention.
Atomic weights (mean relative masses): these are the IUPAC 2013 values and given to 5 significant figures. The last significant figure of each value is considered reliable to ±1 except where a larger uncertainty is given in parentheses. IUPAC representative values are given for those
elements having an atomic weight interval (H, Li, B, C, N, O, Si, S, Cl, Tl). Elements for which the atomic weight is listed within square brackets have no stable nuclides and are represented by the element’s longest lived isotope reported in the IUPAC 2013 values except Tc for which the
value of Tc-99 given as that is the most commonly used isotope.
©2019 Prof Mark J Winter [WebElements Ltd and University of Sheffield]. All rights reserved. For updates to this table see https://www.webelements.com/nexus/printable-periodic-table/ (Version date: 22 June 2019).