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Chemistry
Identify the incorrect statement among the following.
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Q. Identify the incorrect statement among the following.
The d-and f-Block Elements
A
All f-block elements belong to $3^{\text {rd }}$ group
40%
B
Element curium $( Z =96)$ has $5 f ^{7} \,6 d ^{1} \,7 s ^{2}$
9%
C
The actinides tarnish readily in air
16%
D
4f and 5f-orbitals are equally buried
35%
Solution:
$4\, f$ electrons have greater shielding effect but $5\, f$ electrons have poor shielding effect.