sodium - metallic bonding (+1 cations in delocalised electrons), magnesium - metallic bonding (2+ cations in delocalised electrons), aluminium - metallic bonding (3+ cations in delocalised electrons), silicon - giant covalent structure, phosphorous - simple molecular (go around as 4 atoms), sulfur - simple molecular (go around as 8 atoms), chlorine - simple molecular (go around as 2 atoms), argon - simple molecular (go around as 1 atom), intermolecular forces - increase the more electrons are present in molecule, giant covalent structures - very strong covalent bonds, metallic structures - cations surrounded by sea of delocalised electrons,

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