Metallic bonding Flashcards
Structure of a metal
giant structure, Strong forces of electrostatic attraction between the positive metal ions and negative delocalised electrons. Metallic bonding act in all directions. Metal ions form layers.
Why do metals have high melting points
giant structure has many strong metallic bonds which act in many directions. Large amounts of energy required to break these bonds.
How does metal conduct electricity
Delocalised electrons move freely and carry a charge through the structure
Why are pure metal malleable
Ions are the same size.
Ions arranged in regular layers. Layers slide over each other. So can be bent/shaped easily.
Why are alloys less malleable
A mix of different sized ions. Form distorted layers (no layers) That are hard to slide over each other. Harder compared to pure metals
