PERIODIC TABLE
  This is a common long form of the table. Roman numerals and letters heading the vertical columns
indicate the groups (there are differences of opinion regarding the letter designations, those given
here being probably the most generally used). The horizontal rows represent the periods, with two
series removed from the two very long periods and represented below the main table. Atomic
numbers are given above the symbols for the elements. Compare ELEMENT table. 		 
IA1                               VIIA3 Zero4
1
H		 IIA2                     IIIA IVA VA VIA 1
H		 2
He
3
Li		 4
Be		                     5
B		 6
C		 7
N		 8
O		 9
F		 10
Ne
11
Na		 12
Mg		 IIIB IVB VB VIB VIIB VIII IB IIB 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
*La		 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
87
Fr		 88
Ra		 89
#Ac		 104
Rf		 105
Db		 106
Sg		 107
Bh		 108
Hs		 109
Mt		                  
                                   
*LANTHANIDE
SERIES		 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		  
#ACTINIDE
SERIES		 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		  

1Group IA (excluding hydrogen) comprises the alkali metals.
2Group IIA comprises the alkaline-earth metals.
3Group VIIA (excluding hydrogen) comprises the halogens.
4Group Zero comprises the noble gases.