Chapter 2, Problem 13P

Interpretation Introduction

Interpretation:

One member of each of the following sets of compounds(a) ${\left[{\text{NO}}_{\text{2}}\right]}^{\text{+}}\text{,}{\text{CO}}_{\text{2,}}{\left[{\text{NO}}_{\text{2}}\right]}^{\text{-}}\text{and}{\left[{\text{N}}_{\text{3}}\right]}^{\text{-}}$, (b) ${\left[\text{CN}\right]}^{\text{-}}{\text{, N}}_{\text{2,}}{\text{CO}}_{\text{,}}{\left[\text{NO}\right]}^{\text{+}}\text{and}{\left[{\text{O}}_{\text{2}}\right]}^{\text{2-}}$ and (c) ${\left[{\text{SiF}}_{\text{6}}\right]}^{\text{2-}}\text{, }{\left[{\text{PF}}_{\text{6}}\right]}^{\text{-}}\text{,}{\left[{\text{AlF}}_{\text{6}}\right]}^{\text{3-}}\text{and}{\left[{\text{BrF}}_{\text{6}}\right]}^{\text{-}}$ is not isoelectronic with others, is to be determined.

Concept Introduction:

Two or more species, if they possess the same number of electrons are called isoelectronic species. For example, ${\text{O}}^{\text{2-}}{\text{,F}}^{\text{-}}\text{,}{\text{Na}}^{\text{+}}\text{and}{\text{Mg}}^{\text{2+}}$ are isoelectronic species of each other

Isoelectronic species that possess the same structure are called isostructural. For example, ${\left[{\text{BH}}_{\text{4}}\right]}^{\text{-}}\text{,}{\text{CH}}_{\text{4}}\text{and}{\left[{\text{NH}}_{\text{4}}\right]}^{\text{+}}$

Atomic number (Z) = number of protons present in the nucleus of an atom of the element = number of electrons present in a neutral atom of the element