Atomic Number And Mass Number
Chapter Name : Structure Of The Atom |
Sub Topic Code : 102_09_04_05_01 |
Topic Name : Atomic Number And Mass Number |
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Sub Topic Name : Atomic Number |
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Introduction
· Every atom has protons.
· Atomic number = total number of protons in the nucleus.
· It is denoted by 'Z'
· On the basis of Z only, atoms are identified. e.g. If z=1 of an atom, it is Hydrogen.
· If an atom has no charge, or it is neutral, then, Atomic number = the number of electrons.
Pre-Requisites:
Daltons atomic theory, molecules
Activity:
Atoms are the smallest units of any substance.
Real Life Question:
What does an atom look like?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Atom | Smallest unit of a compound. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Watermelon | Red part of watermelon -> positive charge Seeds -> negative charge |
Real life uses :
Atoms make up all substances.
Places to visit :
Laboratory.
Practical examples around us
| Examples | Explainations |
|---|---|
| Watermelon | Red part of watermelon -> positive charge Seeds -> negative charge |
What you learn in Theory:
· Every atom has protons.
· Atomic number = total number of protons in the nucleus.
· It is denoted by 'Z'
· On the basis of Z only, atoms are identified. e.g. If z=1 of an atom, it is Hydrogen.
· If an atom has no charge, or it is neutral, then,Atomic number = the number of electrons.
What you learn in Practice:
Atoms are the smallest unit of any substance.