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          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

  Chemistry 8






Previous page

1
H
2
He
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
55
Cs
56
Ba
57-
71
72
Hf
73
Ta
74
W
75
Rn
76
Os
77
Ir
78
Pl
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
87
Fr
88
Ra
89-
103
104
Rf
105
Db
106
Sg
Bh
108
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Uut
114
Fl
115
Uup
116
Lv
117
Uus
118
Uuo


57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
71
Lu
89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No
103
Lr



Uranium

In the last chapter, we dealt with oxygen and nitrogen. The difference between the two is only one proton in the core. From this we can conclude, that if one could alter the core accordingly, that nitrogen would become oxygen. The vanished proton would then be nothing but a flash of light.

Elements are not things that are unchangeable. We know this, not only since radio activity research was done in the previous century, but also ever since research has been done on the Big-Bang, which allowed the creation of the universe as we know it today. Basically, everything is made up of hydrogen and helium, the most simple building blocks in nature.

The experiments done in 1932, can be accredited to the knowledge about the neutron (James Chadwick), with which, e.g., Enrico Fermi was able to bombard atomic cores like uranium (see above picture), whereby, it either breaks down or becomes even heavier. If there are too many neutrons, they develop into protons and, electrons are also created.

In the subsequent trials done by Otto Hahn and Lise Meitner, uranium breaks down and one observes the resulting new elements and, that approx. 20 percent of the mass has been converted into energy. The negative results are all too well known: The Manhattan-Project (first atomic bomb) and the atomic bombs dropped on Hiroshima and Nagasaki, which were triggered by a chain-reaction.

In the following era, a series of new elements were created, some of which however, only lasted for a very short time. It went on further, with the researching on the borders of the periodic system. In addition, attemps were being made, to produce a sort of copy of the Big-Bang, the nuclear fusion, which however, promised a new source of energy only in decades to come, nowhere near comparable with the dangers of nuclear power. 10/13




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Translator: Don Leslie - Email: lesdon@t-online.de

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