Chapter 6.1, Problem 5LC

(a)

Interpretation Introduction

Interpretation:The given element, gold is to be identified as metal, nonmetal, or metalloid.

Concept introduction:

Based on the metallic properties, elements can be categorized as metals, nonmetals, and metalloids. Metallic character decreases across the period while nonmetallic character increases. So, non-metals are found on the periodic table's right side, while metals are found on the periodic table's left. The periodic table shows metalloids as a stairway between metals and nonmetals.

Answer to Problem 5LC

Metal

Explanation of Solution

Gold is not present on the right side of the periodic table. So, it is not a non-metal. Gold is shiny and can be drawn into wires when hammered. Gold is also a good conductor of heat and electricity. These are characteristic properties of metal. So, gold is a metal.

(b)

Interpretation Introduction

Interpretation:The given element, silicon is to be identified as metal, nonmetal, or metalloid.

Concept introduction:

Based on the metallic properties, elements can be categorized as metals, nonmetals, and metalloids. Metallic character decreases across the period while nonmetallic character increases. So, non-metals are found on the periodic table's right side, while metals are found on the periodic table's left. The periodic table shows metalloids as a stairway between metals and nonmetals.

Answer to Problem 5LC

Metalloid

Explanation of Solution

Silicon is a metalloid as its properties are in between metal and nonmetal. It is neither present onthe left nor right side of the periodic table.

(c)

Interpretation Introduction

Interpretation:The given element, sulfur is to be identified as metal, nonmetal, or metalloid.

Concept introduction:

Based on the metallic properties, elements can be categorized as metals, nonmetals, and metalloids. Metallic character decreases across the period while nonmetallic character increases. So, non-metals are found on the periodic table's right side, while metals are found on the periodic table's left. The periodic table shows metalloids as a stairway between metals and nonmetals.

Answer to Problem 5LC

Nonmetal

Explanation of Solution

Sulfur is present in group 16 of the periodic table which is present on the right side. Sulfur is a poor conductor of heat and electricity and is brittle. Thus, sulfur is a nonmetal.

(d)

Interpretation Introduction

Interpretation:The given element, barium is to be identified as metal, nonmetal, or metalloid.

Concept introduction:

Based on the metallic properties, elements can be categorized as metals, nonmetals, and metalloids. Metallic character decreases across the period while nonmetallic character increases. So, non-metals are found on the periodic table's right side, while metals are found on the periodic table's left. The periodic table shows metalloids as a stairway between metals and nonmetals.

Answer to Problem 5LC

Metal

Explanation of Solution

Barium is present in group 2 and period 6. Metallic character increases down the group. Also, group 2 is present on the left side of the periodic table.

So, barium is a metal.