Chapter 20, Problem 18E

Interpretation Introduction

Interpretation: The atomic number of the next alkali metal to be discovered is to be stated. The physical properties of the next alkali metal is to be compared with the properties of the other alkali metals summarized in Table $19\text{-}4$.

Concept introduction: Alkali metals are found in group $1\text{A}\left(1\right)$ in the periodic table. The valence electron configuration for the alkali metals is ${\text{ns}}^{\text{1}}$.

To determine: The atomic number of the next alkali metal to be discovered and the comparison of physical properties of this alkali metal with the properties of the other alkali metals summarized in Table $19\text{-}4$.