Chapter 8- Metalic crystals Flashcards
1
Q
What is the arrangement of metallic structures?
A
They have a giant 3D lattice structure. The positive electrons are arranged in a sea of electrons. The outer electrons are delocalised. The attraction between positive electrons and the delocalised elctron is a metallic bond.
2
Q
Why do metals have high melting and boiling points?
A
Metallic bonds are string and there are lots to overcome in giant structures so lots of energy is needed.
3
Q
Why are metals good conductors of electricity?
A
Because the delocalised electrons are free to move when a potential difference is applied across the metal.
4
Q
Why are metals malleable and ductile?
A
The layers of positive electrons can easily slide over one another into new positions.
