Metallic Bonding, Properties, and Alloys
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6 Terms
What is a delocalised electron?
An outer shell electron that is no longer associated with a single atom but is free to move throughout the entire metallic structure.
Why do metals have high melting points?
Strong electrostatic forces of attraction between the positive metal ions and the sea of delocalised electrons require a lot of energy to overcome.
Why are metals good conductors?
The delocalised electrons are free to move and carry electrical current or thermal energy throughout the structure.
Define 'malleable'.
The ability of a material to be bent, hammered, or shaped without breaking.
How does an alloy differ from a pure metal?
An alloy contains two or more different elements, whereas a pure metal contains only one. The different atom sizes in an alloy prevent layers from sliding, making it harder.
What is the main component of steel?
Iron, mixed with 1-2% carbon.