Answering Techniques

• Describing metallic bonding

  1. No. of valence electrons delocalised into
  2. ’sea‘ of delocalised electrons
  3. strong electrostatic forces of attraction between
  4. positive proton lattice and negative ‘sea’ of electrons
• Comparing reactivity

  1. State trend
  2. The effect of [factor] has a larger effect than [other factor], resulting in [explaination], therefore [trend]
• Force of attraction between nucleus and electrons

  Nuclear pull/attraction.
• Factors of bond strength

  1. Atomic Radius
  2. Proton number; More protons in nucleus=more nuclear pull
  3. Shielding; number of electron shells
• Covalent bonds are only called strong in giant covalent lattices, otherwise, weak.