2
CHEMISTRY
P
W
MODERN PERIODIC TABLE
s-Block (ns)
Group
Period
1
(1s)
2
(2s, 2p)
3
(3s, 3p)
4
(4s, 3d,
4p)
5
(5s, 4d,
5p)
6
(6s, 4f,
5d, 6p)
7
(7s, 5f,
6d, 7p
d-Block (n – 1)d
1
2
3
4
5
6
7
IA
IIA
IIIB
IVB
VB
VIB VIIB
p-Block (np)
8
9
10
VIII
11
12
13
14
15
16
17
IB
IIB
IIIA
IVA
VA
VIA VIIA VIIIA
Transition metals
(d-Block)
H
18
He
Li
Be
B
C
N
O
F
Ne
Na
Mg
Al
Si
P
S
Cl
Ar
K
Ca
Sc
Ti
V
Cr
Mn
Fe
Co
Ni
Cu
Zn
Ga
Ge
As
Se
Br
Kr
Rb
Sr
Y
Zr
Nb
Mo
Tc
Ru
Rh
Pd
Ag
Cd
In
Sn
Sb
Te
I
Xe
Cs
Ba
La
Hf
Ta
W
Re
Os
Ir
Pt
Au
Hg
Tl
Pb
Bi
Po
At
Rn
Fr
Ra
Ac
Rf
Db
Sg
Bh
Hs
Mt
Ds
Rg
Cn
Nh
Fl
Mc
Lv
Ts
Og
f-Block
The Rare Earths, (n - 2)f
Lanthanide
series (4f)
Period : 6
Ce
Pr
Nd
Pm
Sm
Eu
Gd
Tb
Dy
Ho
Er
Tm
Yb
Lu
Actinide
series (5f)
Period : 7
Th
Pa
U
Np
Pu
Am
Cm
Bk
Cf
Es
Fm
Md
No
Lr
Classification of Elements and Periodicity in Properties
3
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