Group 17 Elements
Chapter Name : The P- Block Elements |
Sub Topic Code : 102_12_07_18_03 |
Topic Name : Group 17 Elements |
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Sub Topic Name : Atomic And Ionic Radii |
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Introduction
• The halogens have the smallest atomic radii in their respective periods due to maximum effective nuclear charge. • The atomic radius of fluorine like the other elements of second period is extremely small. • Atomic and ionic radii increase from fluorine to iodine due to increasing number of quantum shells.
Pre-Requisites:
Periodic table, elements, atomic and ionic radii
Activity:
See weeds have iodine in them.
Real Life Question:
Where does chlorine gas come from?
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 |
|---|---|
| Chlorine disinfectant | Chlorine is used as a disinfectant. |
Places to visit :
Beach.
Practical examples around us
| Examples | Explainations |
|---|---|
| Sea weed, chlorine disinfectant | Sea weed has iodine in it. |
What you learn in Theory:
• The halogens have the smallest atomic radii in their respective periods due to maximum effective nuclear charge. • The atomic radius of fluorine like the other elements of second period is extremely small. • Atomic and ionic radii increase from fluorine to iodine due to increasing number of quantum shells.
What you learn in Practice:
• The halogens have the smallest atomic radii in their respective periods due to maximum effective nuclear charge. • The atomic radius of fluorine like the other elements of second period is extremely small. • Atomic and ionic radii increase from fluorine to iodine due to increasing number of quantum shells.