Metals and Alloys Flashcards
Describe the bonding in metals?
giant structure of atoms arranged in regular layers
What are delocalised electrons?
electrons which are free to move around
Define metallic bonding?
strong electrostatic attraction between the sea of delocalised electrons and positive metal ions
Why do metals have high melting and boiling points?
takes a lot of energy to overcome the strong metallic bonds
Why are metals good conductors of heat and electricity?
contains delocalised electrons which can move and carry charge
Why can metals bend and change shape?
layers of atoms can slide over each other
What is an alloy?
mixture of metals
Why are alloys harder than metals?
different sizes of atoms disrupts the layers so makes if more difficult for the layers to slide over each other
