Electronic Configurations And Types Of Elements S- , P- , D- , F- Blocks
Chapter Name : Classification Of Elements And Periodicity In Properties |
Sub Topic Code : 102_11_03_06_04 |
Topic Name : Electronic Configurations And Types Of Elements S- , P- , D- , F- Blocks |
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Sub Topic Name : The F- Block Elements (Inner Transition Elements) |
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Introduction
• The last electron added to each element is filled in f- orbital. • These two series of elements are hence called the Inner- Transition Elements (f-Block Elements). • They are all metals. • Within each series, the properties of the elements are quite similar. • Both Actinides and lanthanides show +3 oxidation states. • Both are paramagnetic. • They are electropositive and very reactive.
Pre-Requisites:
Element, periodic properties, classification, electronic configuration, orbital
Activity:
Sunglass lenses obstruct the UV radiation coming from the sun since they are made of lanthanides which deflect UV radiation.
Real Life Question:
What are lenses used in sunglasses made of?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Electronic configuration | The distribution of electrons into energy levels of an atom is called the electronic configuration. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| A periodic table | Check out the arrangement of elements in the periodic table. |
Real life uses :
Sunglasses
Places to visit :
A classroom, metalized car window tinting
Practical examples around us
| Examples | Explainations |
|---|---|
| sunglasses | Sunglass lenses obstruct the IR and UV radiation coming from the sun since they are made of lanthanides which deflect UV radiation. |
What you learn in Theory:
• The last electron added to each element is filled in f- orbital. • These two series of elements are hence called the Inner- Transition Elements (f-Block Elements). • They are all metals. • Within each series, the properties of the elements are quite similar. • Both Actinides and lanthanides show +3 oxidation states. • Both are paramagnetic. • They are electropositive and very reactive.
What you learn in Practice:
Objects groups into categories have similar properties.