C3 - Structure and Bonding Revison Flashcards
Metallic bonding Definiton
The electrostatic attraction between two delocalised electrons and a positive nucleus.
Ionic Bonding Definition
The electrostatic attraction between a positive and a negative Ions.
Covalent Bonding Definition
Shared pair of electrons between two outer atoms.
Why are metals good conductors of heat?
metals are good conductors of heat because thhe delocalised electrons flow and transfer in addition to the particles vibration.
What is a giant covalent structure?
A giant covalent structure is one in which the atoms are joined up by covalent bonds over huge (but variable) numbers of atoms.
(Hard to break) (very high melting points) (do not conduct electricity)
What are giant ionic structure?
Giant ionic structures are molecules made of a large number of metal and non-metal ions joined by ionic bonds. The ions in a giant ionic structure are arranged in a regular lattice (a repeating pattern of elements)
What are simple molecular structures
Substances with covalent bonding are often made up of individual molecules. We call this a simple molecular structure. Inside each molecule, strong covalent bonds hold the atoms together, but between the molecules there are only weak forces holding one molecule to another.
