General Properties Of The Transition Elements
Chapter Name : The D- And F- Block Elements |
Sub Topic Code : 102_12_08_03_13 |
Topic Name : General Properties Of The Transition Elements |
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Sub Topic Name : Alloy Formation |
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Introduction
• An alloy is a blend of metals prepared by mixing the components. • Alloys may be homogeneous solid solutions in which the atoms of one metal are distributed randomly among the atoms of the other. • Such alloys are formed by atoms with metallic radii that are within about 15 % of each other. • Because of similar radii and other characteristics of transition metals, alloys are readily formed by these metals. • The alloys so formed are hard and have often high melting points. • The best known are ferrous alloys: chromium, vanadium, tungsten, molybdenum and manganese are used for the production of a variety of steels and stainless steel.
Pre-Requisites:
Periodic table, elements,
Activity:
• Various precious metals such as silver, gold and platinum and industrially important.
Real Life Question:
What is stainless steel made of?
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 |
|---|
Real life uses :
To make jeweler, utensils.
Places to visit :
Bank, jewelers shop.
Practical examples around us
| Examples | Explainations |
|---|---|
| Gold coins, utensils (stainless steel), instruments(brass) | • Various precious metals such as silver, gold and platinum and industrially important. |
What you learn in Theory:
• An alloy is a blend of metals prepared by mixing the components. • Alloys may be homogeneous solid solutions in which the atoms of one metal are distributed randomly among the atoms of the other. • Such alloys are formed by atoms with metallic radii that are within about 15 % of each other. • Because of similar radii and other characteristics of transition metals, alloys are readily formed by these metals. • The alloys so formed are hard and have often high melting points. • The best known are ferrous alloys: chromium, vanadium, tungsten, molybdenum and manganese are used for the production of a variety of steels and stainless steel.
What you learn in Practice:
• An alloy is a blend of metals prepared by mixing the components. • Alloys may be homogeneous solid solutions in which the atoms of one metal are distributed randomly among the atoms of the other. • Such alloys are formed by atoms with metallic radii that are within about 15 % of each other. • Because of similar radii and other characteristics of transition metals, alloys are readily formed by these metals. • The alloys so formed are hard and have often high melting points. • The best known are ferrous alloys: chromium, vanadium, tungsten, molybdenum and manganese are used for the production of a variety of steels and stainless steel.