Page 52 - Chemistry_Form_2

Chemistry
for Secondary Schools

Chapter

Chemical bonding,
Three formula and nomenclature

FOR ONLINE READING ONLY

Introduction

Chemical bonding involves holding atoms together to form molecules or
compounds. A chemical formula refers to symbols and numbers that represent the
composition of a particular chemical substance. Nomenclature means naming. In
this chapter, you will learn about the concept of chemical bonding, the concept
of chemical formulas, the determination of empirical and molecular formulas of
common compounds and the nomenclature of binary inorganic compounds using
the IUPAC system. The competencies developed will enable you to explore the
relationships between chemical substances and apply the acquired knowledge in
understanding properties of different materials used in daily life.

Think
Contribution of chemical bonding, formulas, and nomenclature to
global processes and activities

Concept of chemical bonding

Task 3.1

Use videos, interactive simulations, or other reliable resources to explore the
concept of chemical bonding.

A bond is anything that holds two or more substances together. Many things
used in our daily lives are constructed using different materials joined together
by some bonds. For example, in a brick wall (Figure 3.1), each brick is joined to
the other by a bond made of mortar. Similarly, chemical substances are made of
atoms that are held together by chemical bonds.

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