Thursday, November 4, 2010

CHEMICAL ELEMENT

“Relative atomic mass” in brackets is nucleon number of most stable isotope.
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
actinium
Ac
89
| 227 |
aluminium
Al
13
26.9815
americium
Am
95
| 243 |
antimony
Sb
51
121.75
Argon
Ar
18
39.948
arsenic
As
33
74.9216
astatine
At
85
 | 210 |
barium
Ba
56
137.34
Berkelium
Bk
97
| 247 |
beryllium
Be
4
9.0122
bismuth
Bi
83
208.98
boron
B
5
10.81
bromine
Br
35
79.904
cadmium
Cd
48
112.40
caesium
Cs
55
132.905
calcium
Ca
20
40.08
californium
Cf
98
| 251 |
carbon
C
6
12.011
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
cerium
Ce
58
140.12
chlorine

Cl
17
35.453
chromium
Cr
24
51.996
cobalt
Co
27
58.9332
copper
Cu
29
63.546
curium
Cm
96
| 247 |
dysprosium
Dy
66
162.50
einsteinium
Es
99
| 254 |
erbium
Er
68
167.25
europium
Eu
63
151.96
fermium
Fm
100
 | 257 |
fluorine
F
9
18.9984
francium
Fr
87
| 247 |
gadolinium
Gd
64
157.25
gallium
Ga
31
69.72
germanium
Ge
32
72.59
gold
Au
79
196.967
hafnium
Hf
72
178.49
helium
He
2
4.0026
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
holmium
Ho
67
164.930
hydrogen
H
1
1.00797
indium
In
49
114.82
iodine
I
53
126.9044
iridium
Ir
77
192.2
iron
Fe
26
55.847
krypton
Kr
36
83.80
lanthanum
La
57
138.91
lawrencium
Lr
103
| 257 |
lead
Pb
82
207.19
lithium
Li
3
6.939
lutetium
Lu
71
174.97
magnesium
Mg
12
24.305
manganese
Mn
25
54.936
mendelevium
Md
101
| 258 |
mercury
Hg
80
200.59
molybdenum
Mo
42
95.94
neodymium
Nd
60
144.24
neon
Ne
10
20.179
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
neptunium
Np
93
| 237 |
nickel
Ni
28
58.71
niobium
Nb
41
92.906
nitrogen
N
7
14.0067
nobelium
No
102
| 255 |
osmium
Os
76
190.2
oxygen
O
8
15.9994
palladium
Pd
46
106.4
phosphorus
P
15
30.9738
platinum
Pt
78
195.09
plutonium
Pu
94
| 244 |
polonium
Po
84
| 209 |
potassium
K
19
 39.102
praseodymium
Pr
59
140.907
promethium
Pm
61
| 145 |
protactinium
Pa
91
| 231 |
radium
Ra
88
| 226 |
radon
Rn
86
| 222 |
rhenium
Re
75
186.20
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
rhodium
Rh
45
102.905
rubidium
Rb
37
85.47
ruthenium
Ru
44
101.07
samarium
Sm
62
150.35
scandium
Sc
21
44.956
selenium
Se
34
78.96
silicon
Si
14
28.086
silver
Ag
47
107.868
sodium
Na
11
22.9898
strontium
Sr
38
87.62
sulphur
S
16
32.064
tantalum
Ta
73
180.948
technetium
Tc
43
| 97 |
tellurium
Te
52
127.60
terbium
Tb
65
158.924
thallium
Tl
81
204.73
thorium
Th
90
232.038
thulium
Tm
69
168.934
tin
Sn
50
118.69
ELEMENT
SYMBOLE
PROTON NO / ATOMIC NO
RELATIVE ATOMIC MASS
titanium
Ti
22
47.90
tungsten
W
74
183.85
uranium
U
92
283.03
vanadium
V
23
50.942
Wolfram (tungsten)
W
74
183.85
xenon
Xe
54
131.30
ytterbium
Yb
70
173.04
yttrium
Y
39
88.905
zinc
Zn
30
65.37
zirconium
Zr
40
91.22

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