Chapter 3, Problem 3.109CHP

(a)

Interpretation Introduction

Interpretation:

The unknown elements X in ${\text{X}}^{\text{3+}}$ and Y in ${\text{Y}}^{\text{2-}}$ oxidation state. Whether X is metal or non-metal has to be identified.

Concept introduction:

Metals: According to chemistry, an element of metal easily donates electrons to form cations (positive ion) and forms metallic bonds.

Non-metal: According to chemistry, an element of non-metal easily accepts electrons to form anions (negative ion) and forms non-metallic bonds.

(b)

Interpretation Introduction

Interpretation:

The unknown elements X in ${\text{X}}^{\text{3+}}$ and Y in ${\text{Y}}^{\text{2-}}$ oxidation state. Whether Y is metal or non-metal has to be identified.

Concept introduction:

Metals: According to chemistry, an element of metal easily donates electrons to form cations (positive ion) and forms metallic bonds.

Non-metal: According to chemistry, an element of non-metal easily accepts electrons to form anions (negative ion) and forms non-metallic bonds.

(c)

Interpretation Introduction

Interpretation:

The chemical formula of product compound when X reacts with Y has to be identified.

(d)

Interpretation Introduction

Interpretation:

The group in which elements X and Y are present has to be identified.