Group 16 Elements
Chapter Name : The P- Block Elements |
Sub Topic Code : 102_12_07_10_08 |
Topic Name : Group 16 Elements |
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Sub Topic Name : Chemical Properties |
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Introduction
• The elements of Group 16 exhibit a number of oxidation states. The stability of -2 oxidation state decreases down the group. • Anomalous behavior of oxygen, like other members of the p-block present in second period is due to its small size and high electronegativity. E.g. presence of hydrogen bonding in H2O, not found in H2S. • The absence of d-orbitals in oxygen limits it’s covalency to four and in practice rarely exceeds two. • The stability of the halides decreases in the order F– > Cl– > Br– > I–.
Pre-Requisites:
Periodic table, elements, Physical properties
Activity:
Eggs contain sulfur.
Real Life Question:
What elements are present in eggs?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| group | Group is a series of elements on the periodic table that show similar properties. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Egg, garlic, onion | Eggs contain sulfur. |
Real life uses :
Oxygen, sulfur, minerals.
Places to visit :
Kitchen.
Practical examples around us
| Examples | Explainations |
|---|---|
| oxygen | Oxygen we breathe belongs to group 16. |
What you learn in Theory:
• The elements of Group 16 exhibit a number of oxidation states. The stability of -2 oxidation state decreases down the group. • Anomalous behavior of oxygen, like other members of the p-block present in second period is due to its small size and high electronegativity. E.g. presence of hydrogen bonding in H2O, not found in H2S. • The absence of d-orbitals in oxygen limits it’s covalency to four and in practice rarely exceeds two. • The stability of the halides decreases in the order F– > Cl– > Br– > I–.
What you learn in Practice:
• The elements of Group 16 exhibit a number of oxidation states. The stability of -2 oxidation state decreases down the group.