Chapter 3, Problem 3.94SP

Interpretation Introduction

Interpretation:

The chemical reactivity of $\text{groups 1A and 2A}$ has to be explained.

Concept introduction:

$GroupIA$:

$\text{Group}\text{IA}$ are metallic, bright, silvery, malleable and conducts electricity. Alkali metals are soft, low melting point, low density and chemically reactive. Group $\text{IA}$ elements has least ionization energy due to ${\text{ns}}^{\text{1}}$ unpaired electron in valance shell.

$GroupIIA$:

$\text{Group}\text{IIA}$ arealso known as alkaline earth-metals. They are harder, silvery, shiny and reactive in nature. The valence shell has s-orbital which is completely filled. They easily lose two outer electrons to attain $+2$ oxidation state.