Chapter 2, Problem 2.41QP

(a)

Interpretation Introduction

Interpretation: The fourth-row elements in the periodic table are to be classified as an alkali metal, an alkaline earth metal, a transition metal, a halogen or a noble gas.

Concept introduction: The arrangement of elements in rows and columns is based on the atomic number in the periodic table. The group 1 element of the periodic table is known as alkali metals that are highly reactive and has only one electron in their valence shell. The group 2 of the periodic table is known as alkaline earth metals, has an oxidation number $+2$. The elements that are arranged in group 3 to group 12 are the transition metals also called the main group elements and conduct electricity and heat. The group 17 of the periodic table belongs to halogen family and has 7 electrons in their outermost shells. The group 18 belongs to inert or noble gases family that has 8 electrons in their outermost shell and is highly non-reactive gases that do not form stable compounds with other elements.

To determine: The classification of the given element $\text{Br}$ as an alkali metal, an alkaline earth metal, a transition metal, a halogen, or a noble gas.

(b)

Interpretation Introduction

To determine: The classification of the given element $\text{Ca}$ as an alkali metal, an alkaline earth metal, a transition metal, a halogen, or a noble gas.

(c)

Interpretation Introduction

To determine: The classification of the given element $\text{K}$ as an alkali metal, an alkaline earth metal, a transition metal, a halogen, or a noble gas.

(d)

Interpretation Introduction

To determine: The classification of the given element $\text{Kr}$ as an alkali metal, an alkaline earth metal, a transition metal, a halogen, or a noble gas.

(e)

Interpretation Introduction

To determine: The classification of the given element $\text{V}$ as an alkali metal, an alkaline earth metal, a transition metal, a halogen, or a noble gas.