Chemistry- Alloys
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What is an Alloy?
An alloy is a mixture of elements where at least one is a metal.
What can we use Alloys for?
• dental braces • shape memory alloys: spectacles
Draw structure of alloy:
Draw structure of pure metal:
How is the structure of (pure metals) and alloys
• metals have a giant structure • alloys have a giant structure
How is the structure of (pure metals) and alloys in terms of the particles arrangement
-(pure) Metals: the particles are regular arranged • Allots: the particles are irregular arranged because the atoms have different sizes
How is the structure of (pure metals) and alloys in terms of layers
• (pure) metals: particles are arranged in layers that can slide over each other, allowing the metal to bend and shaped easily • alloys: particles are NOT arranged in layers, meaning alloys cant be bent or shaped
Pure metals are softer and weaker than alloys true or false?
true
alloys are harder and stronger than pure metals true or false?
true
What type of bonds are the results of the sharing of delocalised electrons between metal atoms ?
Metallic bond
Describe melting and boiling point of metals:
The melting and boiling points of metals is high due to the strong metallic bonds that take a lot of energy to break
How are atoms arranged in pure metals?
atoms are arranged in a regular, repeating pattern, forming a crystalline structure.
name some uses of alloys:
• steel= construction • bronze=coins • brass= musical instrument
One use of shape memory alloys:
Medical devices