Type of forces in ionic
Electrostatic
What is in an ionic compound
Metal and non metal
Properties of ionic compounds
High MP, BP, conducts electricity only when molten or dissolved- ions become free to move. Many dissolve in water.
Why do some ionic compounds conduct electricity
Ions free to move when molten or dissolved
Covalent bonds are formed when
Pairs of electrons are shared between non metals
Covalent involve which elements
Non metals
Covalent bond properties
Relatively high MP/BP (weak intermolecular, strong intramolecular), don’t conduct electricity - except for graphite (only 3 C bonded)
Ionic structures
Giant ionic lattice
Covalent structures
Simple molecular (low BP/MP)
Giant covalent (high MP/BP)
Which forces control metallic bonding
Electrostatic
Which elements are involved in metallic bonding
Metals
Structure of metallic
Giant lattice of positive ions
Properties of metallic
High mp/bp: strong electrostatic bonds
Conducts electricity and heat: delocalised electrons are mobile carry charge and KE causing collisions and transferring more heat
Malleable/ ductile: layers of ions can slide over each other
whats the appearance of most ionic compounds
white crystalline solids- except transition metals
What’s an example of a bipyramidal molecule
PF5
