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Chemistry
Lanthanum is grouped with f-block elements because
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Q. Lanthanum is grouped with $f$-block elements because
The d-and f-Block Elements
A
it has partially filled $f$-orbitals
B
it is just before Ce in the periodic table
C
it has both partially filled $f$ and $d$-orbitals
D
properties of lanthanum are very similar to the elements of $f$-block
Solution:
$La$ doesn't have partially filled $f$-orbital.