I  U  P  A  C

Periodic Table of the Elements

> printable version [pdf file - 88KB] (version date 1 May 2013)
- i
ncluding the standard atomic weights 2011 abridged to four significant digits (as published in PAC 85, table 4, p. 1068; http://dx.doi.org/10.1351/PAC-REP-13-03-02; CI tear off Jul/Aug 2013 issue

Earlier versions:
- 1 1 June 2012 [pdf file - 88KB] including Fl and Lv (The IUPAC recommendations of the names and symbols of the elements with atomic numbers 114 and 116 is to appear in PAC July 2012; http://dx.doi.org/10.1351/PAC-REC-11-12-03); CI tear off Jul/Aug 2012 issue
-
Jul-Aug 2011 -- Periodic Table of the Isotopes -- [pdf file -928KB] - see related Chem Int article

- 21 January 2011 [pdf file - 135KB] including the standard atomic weights 2009 abridged to four significant digits (as published in PAC 83, table 4, p. 387 [doi:10.1351/PAC-REP-10-09-14]) - see related Chem Int feature (Mar/Apr 2011 issue)
-
19 February 2010 [pdf file - 196KB] including the standard atomic weights 2007 abridged to four significant digits (as published in PAC 81, table 4, p. 2141 [doi:10.1351/PAC-REP-09-08-03]) and the latest named element copernicium > see CI notice
- 23 August 2007 [pdf file - 201KB] (version date 23 August 2007)
- including the 2007 revised standard atomic weights of 5 chemical elements > see release
- 22 June 2007 - [pdf file - 28KB]
sized to print on A4 and US letter paper, including the 2005 revised standard atomic weights of 16 chemical elements > see release
- 3 Oct 2005 [pdf file - 17KB] or see CI tear off version May/June 2006 issue [pdf file - 68KB]
- 4 Feb 2005 [pdf file - 17KB];
CI tear off Mar/Apr 2005 issue [pdf file - 87KB]
- 1 Nov 2004 [pdf file - 17KB]
- 7 Nov 2003 [pdf file - 17KB];
CI tear off Jan/Feb 2004 issue [pdf file - 474KB]
For a brief historical review of the table, see Chem. Int. 2004, Jan , p. 8

Below, each element is keyed to a color matching the time of its discovery

 
Time of Discovery
Before 1800 1800-1849 1850-1899 1900-1949 1950-1999
1                                 18
1
H
1.0079
2   13 14 15 16 17 2
He
4.0026
3
Li
6.941
4
Be
9.0122
5
B
10.811
6
C
12.011
7
N
14.007
8
O
15.999
9
F
18.998
10
Ne
20.180
11
Na
22.990
12
Mg
24.305
3 4 5 6 7 8 9 10 11 12 13
Al
26.982
14
Si
28.086
15
P
30.974
16
S
32.065
17
Cl
35.453
18
Ar
39.948
19
K
39.098
20
Ca
40.078
21
Sc
44.956
22
Ti
47.867
23
V
50.942
24
Cr
51.996
25
Mn
54.938
26
Fe
55.845
27
Co
58.933
28
Ni
58.693
29
Cu
63.546
30
Zn
65.38
31
Ga
69.723
32
Ge
72.64
33
As
74.922
34
Se
78.96
35
Br
79.904
36
Kr
83.798
37
Rb
85.468
38
Sr
87.62
39
Y
88.906
40
Zr
91.224
41
Nb
92.906
42
Mo
95.96
43
Tc
-
44
Ru
101.07
45
Rh
102.91
46
Pd
106.42
47
Ag
107.87
48
Cd
112.41
49
In
114.82
50
Sn
118.71
51
Sb
121.76
52
Te
127.60
53
I
126.90
54
Xe
131.29
55
Cs
132.91
56
Ba
137.33
57-71 72
Hf
178.49
73
Ta
180.95
74
W
183.84
75
Re
186.21
76
Os
190.23
77
Ir
192.22
78
Pt
195.08
79
Au
196.97
80
Hg
200.59
81
Tl
204.38
82
Pb
207.2
83
Bi
208.98
84
Po
-
85
At
-
86
Rn
-
87
Fr
-
88
Ra
-
89-103 104
Rf
-
105
Db
-
106
Sg
-
107
Bh
-
108
Hs
-
109
Mt
-
110
Ds
-
111
Rg
-
112
Cn
-
  114
Fl
-
  116
Lv
-
   
                                   
La 150.36 La 150.36 La 150.36 57
La
138.91
58
Ce
140.12
59
Pr
140.91
60
Nd
144.24
61
Pm
-
62
Sm
150.36
63
Eu
151.96
64
Gd
157.25
65
Tb
158.93
66
Dy
162.50
67
Ho
164.93
68
Er
167.26
69
Tm
168.93
70
Yb
173.05
71
Lu
174.97
La 150.36 La 150.36 La 150.36 89
Ac
-
90
Th
232.04
91
Pa
231.04
92
U
238.03
93
Np
-
94
Pu
-
95
Am
-
96
Cm
-
97
Bk
-
98
Cf
-
99
Es
-
100
Fm
-
101
Md
-
102
No
-
103
Lr
-
 

 

Notes

- Standard atomic weights last revised based on the 2005 review published in Pure Appl. Chem. 78(11), 2051-2066, 2006 and Aug 2007 release, and here reported to 5 significant figures. Elements with no reported values in the table above have no stable nuclides (alternative tables might display mean relative atomic masses or mass numbers for an arbitrarily selected unstable nuclide of that chemical element). However, three such elements -Th, Pa, and U- have a characteristic terresterial isotopic composition, and for these an atomic weight is tabulated.

A similar table, commemorative of IUPAC 80 Years of Service to Chemistry was produced as a laminated postcard and distributed with the Nov. 2000 issue of Chemistry International

 

 

Symbol

name

 

Symbol

name

 

Symbol

name

 

Ac

actinium

  Ga gallium   Pm promethium
 

Ag

silver*

 

Gd

gadolinium

 

Po

polonium

 

Al

aluminium+

 

Ge

germanium

 

Pr

praseodymium

 

Am

americium

 

H

hydrogen

 

Pt

platinum

 

Ar

argon

 

He

helium

 

Pu

plutonium

 

As

arsenic

 

Hf

hafnium

 

Ra

radium

 

At

astatine

 

Hg

mercury*

 

Rb

rubidium

 

Au

gold*

 

Ho

holmium

 

Re

rhenium

 

B

boron

  Hs hassium  

Rf

rutherfordium

 

Ba

barium

 

I

iodine

  Rg roentgenium
 

Be

beryllium

 

In

indium

 

Rh

rhodium

  Bh bohrium  

Ir

iridium

 

Rn

radon

 

Bi

bismuth

 

K

potassium*

 

Ru

ruthenium

 

Bk

berkelium

 

Kr

krypton

 

S

sulfur

 

Br

bromine

 

La

lanthanum

 

Sb

antimony*

 

C

carbon

 

Li

lithium

 

Sc

scandium

 

Ca

calcium

 

Lr

lawrencium

 

Se

selenium

 

Cd

cadmium

 

Lu

lutetium

  Sg seaborgium
 

Ce

cerium

  Lv livermorium  

Si

silicon

 

Cf

californium

 

Md

mendelevium

 

Sm

samarium

 

Cl

chlorine

 

Mg

magnesium

 

Sn

tin*

 

Cm

curium

 

Mn

manganese

 

Sr

strontium

  Cn copernicium  

Mo

molybdenum

  Ta tantalum
 

Co

cobalt

  Mt meitnerium  

Tb

terbium

 

Cr

chromium

 

N

nitrogen

 

Tc

technetium

 

Cs

caesium+

 

Na

sodium*

 

Te

tellurium

 

Cu

copper*

 

Nb

niobium

 

Th

thorium

  Db dubnium  

Nd

neodymium

 

Ti

titanium

 

Ds

darmstadtium

 

Ne

neon

 

Tl

thallium

 

Dy

dysprosium

 

Ni

nickel

 

Tm

thulium

 

Er

erbium

 

No

nobelium

 

U

uranium

 

Es

einsteinium

 

Np

neptunium

 

V

vanadium

 

Eu

europium

 

O

oxygen

 

W

tungsten*

 

F

fluorine

 

Os

osmium

 

Xe

xenon

 

Fe

iron*

 

P

phosphorus

 

Y

yttrium

  Fl flerovium  

Pa

protactinium

 

Yb

ytterbium

 

Fm

fermium

 

Pb

lead*

 

Zn

zinc

 

Fr

francium

 

Pd

palladium

 

Zr

zirconium


* Some element symbols derive from ancient names; Ag derives from argentum, Au from aurum, Cu from cuprum, Fe from ferrum, Hg from hydrargyrum, K from kalium, Na from natrium, Pb from plumbum, Sb from stibium, Sn from stannum, and W from wolfram.
+ Alternative spellings commonly used are: 'aluminum' for Al and 'cesium' for Cs.

 


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