Chapter 2 - Metals Flashcards
Why are Metals good Conductors of Heat in Solid and Liquid states?
Delocalised electrons act as charge carriers.
Why are Metals good Conductors of Electricity in Solid and Liquid states? ⚡️
Mobility of the delocalised electrons within the lattice of positive ions.
Why are Metals Lustrous (shiny) when freshly cut or cleaned?
Light is reflected off the metallic lattice.
Why are Metals Malleable and Ductile?
The delocalised electrons in metals do not “belong” to any particular positive ion in the lattice so metallic bonding is said to be “non-directional”. Therefore, if sufficient force is applied to the metal, one layer of positive ions can slip or slide over another without affecting the metal bonding. This means that the attractive forces are still present in between the newly deformed metal.
Why are metals hard, tough and dense with high tensile strength
Very strong Electrostatic Bond holds it tightly together therefore they are very strong
Why do metals have high Melting and Boiling points? ❄️
Strong EA between the positive metal ions and the delocalised electrons.
Why are metals sonorous?
They vibrate with a pleasant sound
What is an Alloy?
Alloys are mixtures because they do not have a constant composition.
