Metallic Bonding (TOPIC 4) Flashcards
What is metallic bonding?
The strong electrostatic force of attraction between the lattice of positive ions and the sea of delocalized electrons
What is a metallic lattice?
In metals, the electrons leave the outer shells of metal atoms, forming positive metal ions and a ‘sea’ of delocalised electrons.
The structure of a solid metal consists of closely packed metal ions, arranged in a regular way to form a metallic lattice structure.
Are metals conductors of electricity and heat?
Yes. As the delocalised electrons are able to move through the structure so they can carry a charge and conduct.
Are metals malleable?
Yes as layers of ions can slide over each other.
What is an alloy?
An alloy is a mixture of a metal and one or more elements usually metals or carbon.
Why are alloys harder than pure metals?
They are made up of atoms that are not uniform so they are made up of different sizes and cannot slide over each other.
