General Properties Of The Transition Elements
Chapter Name : The D- And F- Block Elements |
Sub Topic Code : 102_12_08_03_01 |
Topic Name : General Properties Of The Transition Elements |
|
Sub Topic Name : Physical Properties |
|
Introduction
• Nearly all the transition elements display
typical metallic properties such as
• High tensile strength,
• Ductility,
• Malleability,
• High thermal and electrical conductivity and
• Metallic lustre.
•
With the exceptions of Zn, Cd, Hg and Mn, they have
one or more typical metallic structures at normal temperatures.
•
The transition metals (with the exception of Zn, Cd
and Hg) are very much hard and have low volatility.
•
Their melting and boiling points are high.
•
The high melting points of these metals are attributed
to the involvement of greater number of electrons from (n-1)d in addition to
the ns electrons in the interatomic metallic bonding.
• In general, greater
the number of valence electrons, stronger is the resultant interatomic bonding.
Pre-Requisites:
Periodic table, elements
Activity:
Various precious metals such as silver, gold and
platinum and industrially important
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 |
|---|---|
| Iron Rod Copper wire | Iron and copper both belong to the d block (transition) metals. |
Real life uses :
To make jewellery, utensils
Places to visit :
Bank, jewellery shop
Practical examples around us
| Examples | Explainations |
|---|---|
| Gold coins | • Various precious metals such as silver, gold and platinum and industrially important. |
What you learn in Theory:
• Nearly all the transition elements display
typical metallic properties such as
• High tensile strength,
• Ductility,
• Malleability,
• High thermal and electrical conductivity and
• Metallic lustre.
•
With the exceptions of Zn, Cd, Hg and Mn, they have
one or more typical metallic structures at normal temperatures.
•
The transition metals (with the exception of Zn, Cd
and Hg) are very much hard and have low volatility.
•
Their melting and boiling points are high.
•
The high melting points of these metals are attributed
to the involvement of greater number of electrons from (n-1)d in addition to
the ns electrons in the interatomic metallic bonding.
In general, greater
the number of valence electrons, stronger is the resultant interatomic bonding.
What you learn in Practice:
• Nearly all the transition elements display
typical metallic properties such as
• High tensile strength,
• Ductility,
• Malleability,
• High thermal and electrical conductivity and
• Metallic lustre.
•
With the exceptions of Zn, Cd, Hg and Mn, they have
one or more typical metallic structures at normal temperatures.
•
The transition metals (with the exception of Zn, Cd
and Hg) are very much hard and have low volatility.
•
Their melting and boiling points are high.
•
The high melting points of these metals are attributed
to the involvement of greater number of electrons from (n-1)d in addition to
the ns electrons in the interatomic metallic bonding.
In general, greater
the number of valence electrons, stronger is the resultant interatomic bonding.