Empirical (or molecular) formulas of compounds that the elements in the third period (sodium to chlorine) should form with molecular oxygen have to be determined and the compound formed is whether ionic or molecular in character has to be identified. Concept Introduction: According to physical and chemical properties, the elements can be further divided into metals, non-metals and metalloids. In a group, the metallic character of an element increases from top to bottom whereas in a period, it decreases from left to right. The periodic table is given below: Oxide is a compound that is formed when oxygen reacts with another element. Ionic compounds are formed by the transfer of electrons between a metal and a nonmetal. Molecular (covalent) compounds are formed by the sharing of electrons between two nonmetals.

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Chapter 8, Problem 8.77QP

(a)

Interpretation Introduction

Interpretation:

Empirical (or molecular) formulas of compounds that the elements in the third period (sodium to chlorine) should form with molecular oxygen have to be determined and the compound formed is whether ionic or molecular in character has to be identified.

Concept Introduction:

According to physical and chemical properties, the elements can be further divided into metals, non-metals and metalloids.

In a group, the metallic character of an element increases from top to bottom whereas in a period, it decreases from left to right.

The periodic table is given below:

Oxide is a compound that is formed when oxygen reacts with another element.

Ionic compounds are formed by the transfer of electrons between a metal and a nonmetal. Molecular (covalent) compounds are formed by the sharing of electrons between two nonmetals.

(b)

Interpretation Introduction

Interpretation:

Empirical (or molecular) formulas of compounds that the elements in the third period (sodium to chlorine) should form with molecular chlorine have to be determined and the compound formed is whether ionic or molecular in character has to be identified.

Concept Introduction:

According to physical and chemical properties, the elements can be further divided into metals, non-metals and metalloids.

In a group, the metallic character of an element increases from top to bottom whereas in a period, it decreases from left to right.

The periodic table is given below:

Ionic compounds are formed by the transfer of electrons between a metal and a nonmetal. Molecular (covalent) compounds are formed by the sharing of electrons between two nonmetals.

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