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JEEMAIN and NEET
>>
Chemistry
>>
d-and-f-Block Elements
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Q)
Variable valency is shown by
(
a
)
T
y
p
i
c
a
l
e
l
e
m
e
n
t
s
(
b
)
T
r
a
n
s
i
t
i
o
n
e
l
e
m
e
n
t
s
(
c
)
N
o
r
m
a
l
e
l
e
m
e
n
t
s
(
d
)
N
o
n
e
o
f
t
h
e
s
e
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