C3.9 and C3.10 - Bonding In Metals and propeties(Finished) Flashcards
Why are metals malleable?
The layers of atoms can slide over eachother
Why are alloys harder than pure metals?
Different elements have different sized atoms so when another element is mixed with the metal, the layers will become distorted making it harder for them to slide over each other
What does it mean that electrons are delocalised in a metal?
The electrons in the outer shell of the metal atoms are delocalised (free to move around)
What is metallic bonding and what causes it?
Metalic bonding is the strong forces of electrostatic attraction between positive metal ions and negative delocalised electrons holding atoms together
Why can metals conduct electricity and heat well?
The delocalised electrons can carry current and thermal energy through the structure and quickly
Why can metal layers slide over each other despite large attraction electrostatic forces?
Because the delocalised electrons can move and hold ions together at the same time
Why do metals have high boiling and melting points?
The electrostatic forces of attraction between metal atoms and delocalised electrons is very strong so lots of energy is needed to break them
