Structure Of An Atom
Chapter Name : Atoms And Molecules |
Sub Topic Code : 102_09_03_02_03 |
Topic Name : Structure Of An Atom |
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Sub Topic Name : Existence Of Atoms |
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Introduction
Atoms never exist independently irrespective of any element. Atoms form molecules and ions. A molecule is in general a group of two or more atoms that are chemically bonded together.
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 doesn’t oxygen exist in a single atomic form?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| molecule | Is in general a group of two or more atoms that are chemically bonded together? |
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 never exist independently irrespective of any element. Atoms form molecules and ions. A molecule is in general a group of two or more atoms that are chemically bonded together.
What you learn in Practice:
A molecule represents different matter.