Chapter 23, Problem 12E

Interpretation Introduction

Interpretation: The periodic trend for the given observation is to be determined from the given trends.

Concept introduction: In case of transition metals, the oxidation state depends on the number of unpaired electrons present in both $\text{s}$ and $\text{d}$ orbitals. Moreover, greater the number of unpaired electrons, higher is the oxidation state.

To determine: The periodic trend that is responsible for the observation that the maximum oxidation state of the transition-metal elements peaks near group $\text{7B}$ and $\text{8B}$ .