Periodic Table
of the Elements
> printable version
[pdf file - 88KB] (version
date 1 May 2013)
- including 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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