T4 - Metallic Bonding and Giant Metallic Structures Flashcards
what does a metallic lattice look like
a lattice structure of positive ions surrounded by a sea of delocalised electron
what is metallic bonding
a strong electrostatic force of attraction between the positive ions and the sea of delocalised electrons
Why do metals have high melting and boiling points?
metals have giant metallic structures. Giant metallic structures have strong metallic bonds which take a lot of energy to overcome
Why do metals conduct electricity
there are free electrons available to move through the structure and carry charge
why are metals malleable and ductile
Layers of positive ions can slide over each other
what is an alloy
A mixture of a metal and one or more elements, usually other metals or carbon
Why are alloys harder than pure metals?
the layers have different sized atoms meaning that distort the regular arrangement of atoms meaning it is harder for layers to slide over each other
