Chapter 2, Problem 16DQ

Interpretation Introduction

Interpretation: The reason for the difference in naming of compounds, barium nitrate and iron(II) nitrate despite of their similar formula has to be stated.

Concept introduction:The element iron belongs to the transition metal category. It displays both $+2$ and $+3$ oxidation states and hence each has to be represented distinctly using roman numerals in compounds. The element barium belongs to the category of alkali metals which displays only one oxidation state of $+2$ , thus it doesn’t require any specific representation in compounds.