Bonding Flashcards
Definition of ionic bonding
Electrostatic forces of attraction between positive and negative electrons.
Properties of of ionic bonding
High boiling and melting points.
Can conduct electricity when molten or dissolved beacause ions are free to move.
Definition of covalent bonding
Bond between two non-metals formed by a shared pair of electrons between two atoms with a strong force of attraction.
Simple molecules
Low melting and boiling points.
Weak covalent bonds.
Can’t conduct electricity because there are no electrons or ions to move.
Giant molecules
Lattice structures.
High melting and boiling points.
Strong covalent bonds so difficult to overcome with lots of heat needed.
Can’t conduct electricity except graphite.
Diamond
Hard
Each atom is joined to 4 other ones
Does not conduct electricity
Graphite
Soft and slippery
Layers are weak and can be easily separated
Need to be broken down
C60 Fullerene
Soft
Low melting and boiling points.
Can conduct electricity.
Each carbon atom joined to 3 other carbon atoms and the 4th is delocalised and free to move.
Small amounts of heat to overcome them so weak covalent bonds.