Chapter 7.11, Problem 14PE

(a)

Interpretation Introduction

Interpretation: The given set of elements is to be arranged in the order of their increasing size.

Concept introduction: The distance from nucleus to the valance shell is atomic size. Atomic size varies as we move across or down the group. Nuclear charge of atom also determines the size of atom.

To determine: The order of increasing size of elements ${\text{Cl}}^{-}$, ${\text{F}}^{-}$ and ${\text{Li}}^{\text{+}}$.

(b)

Interpretation Introduction

To determine: The order of increasing size of elements ${\text{P}}^{3-}$, ${\text{Al}}^{3+}$ and ${\text{Mg}}^{\text{2+}}$.