chemistry - Metals And Alloys Flashcards
(10 cards)
what are delocalised electrons?
Electrons (- charge) they are free to move
structure of a metal consists of?
- delocalised electrons
- positive ions structured in layers
- high BP/MP
Why do metals have high BP/MP?
Because metals have very strong metallic bonds that requires lots of heat energy to break those bonds.
Why are metals malleable?
Because the delocalised electrons are free to move and the ions are arranged in layers that can easily slide over.
Why are metals good conductors of electricity?
Because the delocalised electrons that are free to move carry a negative charge that generates electricity.
Why is alloy harder than pure metals?
Because alloy is a mixture of different metallic elements. they differ in atomic size, alloys arrangement makes the sliding of layers more difficult.
Name physical properties of metals?
- malleable
- shiny
Which metal is used for the electrical wiring?
Copper, because it is a good conductor and doesn’t corrode easily.
Where are non-metals found on the periodic table?
The right side.
Examples of non - metals?
Carbon, argon, fluorine, oxygen
