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Structure Of An Atom
Chapter Name : Atoms And Molecules
Sub Topic Code : 102_09_03_02_04
Topic Name : Structure Of An Atom
Sub Topic Name : Size Of An Atom
Introduction

Atoms are very small. Atomic radius is measured in nanometer 1nm = 1 X 10-9 m.

Pre-Requisites:

Atom, matter, element

Activity:

Each compound is represented by symbols of the atoms of each element present in the compound and each atom has its specific atomic mass.

Real Life Question:

Why aren’t atoms visible by the naked eye?

Key Words / FlashCards
Key Words Definitions (pref. in our own words)
Atomic size Size of the one atom of an element.
Learning aids / Gadgets
Gadgets How it can be used
Periodic table Use a periodic table to see the symbols and atomic mass units of different atoms.
Real life uses :

Molecules make up the human body. Ex: DNA.

Places to visit :

Chemistry lab.

Practical examples around us
Examples Explainations
Water is denoted by the formula H2O Water is denoted by the symbols for hydrogen and oxygen. It is a molecule made of hydrogen and oxygen.
What you learn in Theory:

Atoms are very small. Atomic radius is measured in nanometer 1nm = 1 X 10-9 m.

What you learn in Practice:

Atoms are extremely small in size.

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