Modern Periodic Law And The Present Form Of Periodic Table
Chapter Name : Classification Of Elements And Periodicity In Properties |
Sub Topic Code : 102_11_03_03_01 |
Topic Name : Modern Periodic Law And The Present Form Of Periodic Table |
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Sub Topic Name : Modern Periodic Law And The Present Form Of Periodic Table |
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Introduction
Mendeleev’s periodic law and table were modified to give the new long form of periodic table. This was made after the discovery of Moseley which suggested that Atomic number was a more important property to classify elements.
Pre-Requisites:
Element, periodic properties, periodic trend, classification
Activity:
Try figuring out the features of an old vs. a new model of a car, TV, phone etc.
Real Life Question:
What makes a new or an old car similar? What is the basic requirement for a car?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Fundamental property | Fundamental property is the most important property of an object that is used to compare it with other objects. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Car | A new car model and an old one can be compared to see what are the changes brought about in the new model and why? Since a cars’ fundamental aim is to be useful for driving, modifications are made accordingly to get a car to be easy to drive |
Real life uses :
Fundamental properties of objects are used to classify them.
Places to visit :
Living room, garage.
Practical examples around us
| Examples | Explainations |
|---|---|
| Car | Cars are classified according to the features which make it easy to drive, its most fundamental feature. |
What you learn in Theory:
Mendeleev’s periodic table was modified into the modern periodic table based on atomic number which Moseley found to be the most fundamental property when classifying elements.
What you learn in Practice:
Fundamental properties of objects are needed to classify them into groups which can be conveniently studied for learning.