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Question
Chemistry
The elements in which electrons are progressively filled in 4f orbital are called
Q. The elements in which electrons are progressively filled in 4f orbital are called
2069
155
KCET
KCET 2019
The d-and f-Block Elements
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A
Lanthanoids
75%
B
Halogens
6%
C
Actinoids
11%
D
Transition elements
9%
Solution:
In lanthanoids, electrons are progressively filled in
4
f
orbital. The general electronic configuration for lanthanoids is
[
X
e
]
4
f
1
−
14
5
d
0
−
1
6
s
2