Chemical Bonding

Question 1

describe metallic bonding

Answer 1

• giant metallic lattice structure, metal cations arranged in a lattice and surrounded by a ‘sea’ of delocalised electrons
• electrostatic attraction between the lattice of metal cations and the ‘sea’ of delocalised electrons form metallic bonds

Question 2

factors affecting metallic bond strength

Answer 2

• no. of delocalised electrons: due to more valence electrons
• high charge density: due to higher charge and smaller ionic radius
• leads to: greater electrostatic attraction between metal cation and delocalised electrons → stronger metallic bond strength.
• greater electrical conductivity: more valence electrons → more mobile charge carriers

Question 3

factors affecting ionic bond strength

Answer 3

increase in Lattice Energy: higher charge, decrease in ionic radius, decrease in interionic distance b/w cation and anion → stronger electrostatic attractions between cation and anion, more energy to overcome