Chapter 2.4, Problem 4PE

(a)

Interpretation Introduction

To determine: The symbol and name of the metalloid in group $15$ closest in mass to the noble gas configuration.

Interpretation: The symbol and name of the metalloid in group $15$ closest in mass to the noble gas configuration are to be stated.

Concept introduction: Metalloids or semiconductors are the elements which tend to have the physical properties of metals but the chemical properties of non-metals.

(b)

Interpretation Introduction

To determine: The symbol and name of the representative element in the fourth row that is an alkaline earth metal.

Interpretation: The symbol and name of the representative element in the fourth row that is an alkaline earth metal is to be stated.

Concept introduction: Alkaline earth metals belong to group $2$ of the periodic table. Representative elements are the elements in group $1,2,$ and $13$ through $18$ of the periodic table.

(c)

Interpretation Introduction

To determine: A transition metal in the sixth row with chemical properties similar to zinc.

Interpretation: A transition metal in the sixth row with chemical properties similar to zinc is to be predicted.

Concept introduction: The transition metals are the elements in group $3$ through $12$ of the periodic table. They are nearly all classic metals: hard, shiny, ductile, malleable and excellent conductors of electricity.

(d)

Interpretation Introduction

To determine: A nonmetal in the third row with chemical properties similar to oxygen.

Interpretation: A nonmetal in the third row with chemical properties similar to oxygen is to be predicted.

Concept introduction: Non-metals are poor conductor of heat and electricity. Most of the non-metals are gases at room temperature.