There are greater similarities in the properties of the transition
elements of a horizontal row in contrast to the non-transition elements However, some group similarities also exist We shall first study the
general characteristics and their trends in the horizontal rows
(particularly 3d row) and then consider some group similarities 2nd Series
Y
Zr
Nb
Mo
Tc
Ru
Rh
Pd
Ag
Cd
Z
39
40
41
42
43
44
45
46
47
48
5s
2
2
1
1
1
1
1
0
1
2
4d
1
2
4
5
6
7
8
10
10
10
3rd Series
La
Hf
Ta
W
Re
Os
Ir
Pt
Au
Hg
Z
57
72
73
74
75
76
77
78
79
80
6s
2
2
2
2
2
2
2
1
1
2
5d
1
2
3
4
5
6
7
9
10
10
Ac
Rf
Db
Sg
Bh
Hs
Mt
Ds
Rg
Cn
Z
89
104
105
106
107
108
109
110
111
112
7s
2
2
2
2
2
2
2
2
1
2
6d
1
2
3
4
5
6
7
8
10
10
4th Series
On what ground can you say that scandium (Z = 21) is a transition
element but zinc (Z = 30) is not