The Lanthanoids
Chapter Name : The D- And F- Block Elements |
Sub Topic Code : 102_12_08_05_01 |
Topic Name : The Lanthanoids |
|
Sub Topic Name : Electronic Configurations |
|
Introduction
•
It may be noted that atoms of these elements have
electronic configuration with 6s2 common but with variable occupancy
of 4f level
However, the
electronic configurations of all the tripositive ions (the most stable
oxidation state of all the lanthanoids) are of the form 4f n (n = 1 to 14 with
increasing atomic number
Pre-Requisites:
Periodic table, elements
Activity:
Sunglass lenses use lanthanides for deflecting
infrared and UV radiation
Real Life Question:
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Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| group | Group is the vertical column on the periodic table which contains elements having the similar properties |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Lasers, Glass polishing, Sunglass lenses | Lasers, glass polishing devices and sunglass lenses use lanthanides |
Real life uses :
Sunglass lenses use lanthanides for
deflecting UV and IR radiation
Places to visit :
House, optical store
Practical examples around us
| Examples | Explainations |
|---|---|
| Sunglass lenses | Sunglass lenses use lanthanides for deflecting UV and IR radiation |
What you learn in Theory:
•
It may be noted that atoms of these elements have
electronic configuration with 6s2 common but with variable occupancy
of 4f level
However, the
electronic configurations of all the tripositive ions (the most stable
oxidation state of all the lanthanoids) are of the form 4f n (n = 1 to 14 with
increasing atomic number
What you learn in Practice:
•
It may be noted that atoms of these elements have
electronic configuration with 6s2 common but with variable occupancy
of 4f level
However, the
electronic configurations of all the tripositive ions (the most stable
oxidation state of all the lanthanoids) are of the form 4f n (n = 1 to 14 with
increasing atomic number