Adynas Flash cards

Created by: adina seremet
Created on: 05-05-22 12:24

Metals and alloys

The structure of metals explains their high melting and boiling points and their conductivity. The properties of a metal can be modified by mixing it with another substance to form an alloy.

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Metallic bonding

Metals consist of giant structures of atoms.arranged in a regular pattern.
The electrons from the outer shells of the metal atoms are delocalised, and are free to move through the whole structure. This sharing of delocalised electrons results in strong me

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Properties of metals

they are electrical conductors because their delocalised electrons carry electrical charge through the metal
they are good conductors of thermal energy because their delocalised electrons transfer energy

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Alloys

An alloy is a mixture of two or more elements, where at least one element is a metal. Many alloys are mixtures of two or more metals.

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Comparing properties of alloys and pure metals

Many pure metals are too soft for many uses. They can be made harder by adding another element to the pure metal, so forming an alloy. This explains why an alloy often has more uses than the pure elements it is made from.

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Explaining alloy hardness

In the solid state, a pure metal has a giant metallic structure. The atoms are arranged in layers. When a force is applied, the layers may slide over each other. The greater the force needed, the harder and stronger the metal.

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Other cards in this set

Card 2

Front

Metallic bonding

Back

Card 3

Front

Properties of metals

Back

Card 4

Front

Alloys

Back

Card 5

Front

Comparing properties of alloys and pure metals

Back

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