K has a larger atomic radius than Li. This confirms: - Vidyadip

MCQ

$\ce{K}$ has a larger atomic radius than $\ce{Li}$. This confirms:

A
Atomic radius decreases down a group.
✓
Atomic radius increases down a group.
C
Atomic radius decreases across a period.
D
Atomic radius increases across a period.

✓

Answer

Correct option: B.

Atomic radius increases down a group.

Atomic radius increases down a group.
$\ce{K}$ and $\ce{Li}$ are in the same group, and $\ce{K}$ lies below $\ce{Li}.$
$\ce{K}$ has a larger atomic radius than $\ce{Li}.$
This happens because as we move down the group new shells are added and this increases the distance between the outermost electron and the nucleus.

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