Group 16 Elements
Chapter Name : The P- Block Elements |
Sub Topic Code : 102_12_07_10_07 |
Topic Name : Group 16 Elements |
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Sub Topic Name : Physical Properties |
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Introduction
• Oxygen and sulphur are non-metals. • Selenium and tellurium are metalloids. • Polonium is a metal. • Polonium is radioactive and is short lived (Half-life 13.8 days). • All group 16 elements exhibit allotropy. (Occurring in two or more different forms). • The melting and boiling points increase with an increase in atomic number down the group. • The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of their atomicity; oxygen exists as diatomic molecule (O2) whereas sulphur exists as polyatomic molecule (S8).
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:
• Oxygen and sulphur are non-metals. • Selenium and tellurium are metalloids. • Polonium is a metal. • Polonium is radioactive and is short lived (Half-life 13.8 days). • All group 16 elements exhibit allotropy. (Occurring in two or more different forms). • The melting and boiling points increase with an increase in atomic number down the group. • The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of their atomicity; oxygen exists as diatomic molecule (O2) whereas sulphur exists as polyatomic molecule (S8).
What you learn in Practice:
• Oxygen and sulphur are non-metals. • Selenium and tellurium are metalloids. • Polonium is a metal. • Polonium is radioactive and is short lived (Half-life 13.8 days). • All group 16 elements exhibit allotropy. (Occurring in two or more different forms). • The melting and boiling points increase with an increase in atomic number down the group. • The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of their atomicity; oxygen exists as diatomic molecule (O2) whereas sulphur exists as polyatomic molecule (S8).