Metals as Conductors (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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Why are metals good conductors of heat & electricity?
Why are metals good conductors of heat & electricity?
They contain delocalised electrons that move freely
What are delocalised electrons in metals?
What are delocalised electrons in metals?
Electrons not bound to specific atoms; can move freely throughout metal
How do metals conduct electricity?
How do metals conduct electricity?
Delocalised electrons move in one direction, carrying electric charge
What is an electric current?
What is an electric current?
Flow of electrons through a conductor
How do metals conduct heat?
How do metals conduct heat?
Delocalised electrons gain energy, move faster, transfer energy throughout
What is metallic bonding?
What is metallic bonding?
Attraction between positive ions & sea of delocalised electrons
What is the 'sea of electrons' in metals?
What is the 'sea of electrons' in metals?
Delocalised electrons surrounding positively charged metal ions
What is malleability?
What is malleability?
Layers of atoms slide over each other without breaking bonds
What is ductility?
What is ductility?
Metals can be drawn into wires; bonds remain intact
Why is copper used in electrical wiring?
Why is copper used in electrical wiring?
High electrical conductivity, relatively inexpensive
Why is aluminium used in power lines?
Why is aluminium used in power lines?
Lightweight and good conductor of electricity
Why are gold & silver used in electronics?
Why are gold & silver used in electronics?
Better conductors than copper and don't corrode