bonding

Question 1

Ionic bonding and structure

Answer 1

metals and non metals
metals donate valence electrons and non metals accept electrons, to get full outershell
metals form positive ion, non metals form negative ions
ions held together by electrostatic forces
ions form a lattice, solid crystalline properties
ionic compounds have high melting points coz strong electro static attraction
dissolve in water notmally coz polar
dont conduct eleccy in solid state but do as liquid coz ions free to move

Question 2

covalent bonding

Answer 2

covalent bonding is between a pair of electrons and positively charged nuclei
the atoms are held together by the mutual attraction of the pair of electrons for both nuclei