Bonding and Structure Flashcards
define an ionic bond
the electrostatic force of attraction between positive ions and negative ions
define a covalent bond
the mutal attraction of two nuclei for a shared pair of electrons
what types of atoms form ionic bonds
metals and non-metals
what types of atoms form covalent bonds
non-metals and non-metals
what is the structure of ionic bonds
lattice
what structures do covalent bonds form
molecular
network
what is metallic bonding
the attraction between positive metal ions and delocalised electrons
what atoms form covalent netwrok
-silicon
-boron
-carbon
general properties of ionic lattices
MP/BP - generally high
SOLUBLE in water - Y
Conduct electricty - when molten or in solution
general properties of covalent molecular
MP/BP- low
Soluble in water - N
Conduct electricity - N
general properties of covalent networks
MP/BP - high
Soluble in water - N
Conduct electricty - only carbon
general properties of metals
MP/BP - high
soluble - N
conduct electrity - yes
why can ionc lattices conduct when molten or in solution
the ions are free to move
