Question

Arrange these species in the order of increasing size:

Answer 1

Just Note the below follow the below principle

$\boxed{\sf SCLA}$

• It stands for Smaller cation and larger anion.

#1

$\\ \sf\longmapsto Ar$

#2

$\\ \sf\longmapsto Fe^{2+}$

#3

$\\ \sf\longmapsto Na$

#4

$\\ \sf\longmapsto B$