Chapter 2, Problem 2.59AP

Interpretation Introduction

Interpretation:

The name of the element should be identified which is similar with potassium element.

Concept introduction:

Metal:

A metal is a material that, when freshly prepared, polished, or fractured, has a shiny appearance. Metal has the capacity to conducts the electricity and heat. Metals are malleable or ductile.

Alkali metals:

Alkali metals are a group of elements in the periodic table.  The elements present in this group are lithium ($\text{Li}$), sodium ($\text{Na}$), potassium ($\text{K}$), rubidium ($\text{Rb}$), caesium ($\text{Cs}$), and francium ($\text{Fr}$).