WebPeriodic Table

Author:Yoshihisa Kawaguchi

Copyrights all reserved 1999 by Y.Kawaguchi



 
 
 

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Group 1 2 - 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Period  
1 1
H		 ---- 2
He
2 3
Li		 4
Be		 ---- 5
B		 6
C		 7
N		 8
O		 9
F		 10
Ne
3 11
Na		 12
Mg		 ---- 13
Al		 14
Si		 15
P		 16
S		 17
Cl		 18
Ar
4 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
5 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
6 55
Cs		 56
Ba		 * 71
Lu		 72
Hf		 73
Ta		 74
W		 75
Re		 76
Os		 77
Ir		 78
Pt		 79
Au		 80
Hg		 81
Tl		 82
Pb		 83
Bi		 84
Po		 85
At		 86
Rn
7 87
Fr		 88
Ra		 ** 103
Lr		 104
Rf		 105
Db		 106
Sg		 107
Bh		 108
Hs		 109
Mt		 110
Uun		 111
Uuu		 112
Uub		 113
Uut		 114
Uuq		 115
Uup		 116
Uuh		 117
Uus		 118
Uuo
- ---
*Lanthanoids * 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		 ---- ---
**Actinoids ** 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		 ---- ---

    1)  Why have lanthanoid metals high magnetic susceptibilities ?

    2)  Why is it hard to determine electron-affinities of elements ?

    3)  Why are H,N,O.F Cl gases at room temperature?