1
H
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 1
D
.

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He
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Li
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B
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C
...
 7
N
.
 8
O
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 9
F
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 10
Ne
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 11
Na
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 12
Mg
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Al
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 14
Si
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 15
P
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S
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 17
Cl
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 18
Ar
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 19
K
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Ca
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 21
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 22
Ti
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 23
V
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Cr
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 25
Mn
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 26
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 27
Co
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 28
Ni
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 29
Cu
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 30
Zn
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 31
Ga
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 32
Ge
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 33
As
...
 34
Se
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 35
Br
..
 36
Kr
.
 37
Rb
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 38
Sr
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 39
Y
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 40
Zr
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 41
Nb
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 42
Mo
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 43
Tc
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 44
Ru
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 45
Rh
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 46
Pd
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 47
Ag
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 48
Cd
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 49
In
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 50
Sn
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 51
Sb
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 52
Te
...
 53
I
...
 54
Xe
.
 55
Cs
...
 56
Ba
...
 57-71
La-Lu

 72
Hf
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 73
Ta
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 74
W
...
 75
Re
...
 76
Os
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 77
Ir
...
 78
Pt
...
 79
Au
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 80
Hg
..
 81
Tl
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 82
Pb
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 83
Bi
...
 84
Po
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 85
At
...
 86
Rn
.
 87
Fr
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 88
Ra
...
 89-103
Ac-Lr

 104
Rf

 105
Db

 106
Sg

 107
Bh

 108
Hs

 109
Mt

 110
Ds

 111
Rg

 112
Cn

 113
Uut

 114
Fl

 115
Uup

 116
Lv

 117
Uus

 118
Uuo

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La
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Ce
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 60
Nd
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 61
Pm
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 62
Sm
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 63
Eu
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 64
Gd
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 65
Tb
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 66
Dy
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 67
Ho
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 68
Er
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 69
Tm
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 70
Yb
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 71
Lu
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 89
Ac
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 90
Th
...
 91
Pa
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 92
U
...
 93
Np
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 94
Pu
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 95
Am
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 96
Cm
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 97
Bk
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 98
Cf
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 99
Es
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 100
Fm
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 101
Md
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 102
No
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 103
Lr

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    107    

107 Bh Bohrium

Transition metal, no stable and no natural isotopes.

Bohrium

First made probably 1981 by bombarding bismuth with chromium, it often decays to dubnium. Bohrium isotopes have half-lifes of maximal some minutes.


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