Chemistry - PERIODIC TABLE Question with Solution | TestHub

Lanthanide contraction due to 4f subshell is responsible for smaller size of $Tl$ as compared to $In$

Due to more penetration effect of "s" subshell in Be, its IE value is less than that of Boron.

All the elements of 4d series have higher IE value than the corresponding 5d element of the same group.

Size of La is greater than that of Y