This Study Mind Tutorial covers the following specification points:

Edexcel: 2.23(i,ii), 2.24, 2.26, 2.27

2.23. know that giant lattices are present in:

(i) ionic solids (giant ionic lattices)

(ii) covalently bonded solids, such as diamond, graphite and silicon(IV) oxide (giant covalent lattices)

2.24. know that the structure of covalently bonded substances such as iodine, I₂, and ice, H₂O, is simple molecular

2.26. be able to predict the type of structure and bonding present in a substance from numerical data and/or other information

2.27. be able to predict the physical properties of a substance, including melting and boiling temperature, electrical conductivity and solubility in water, in terms of:

(i) the types of particle present (atoms, molecules, ions, electrons)

(ii) the structure of the substance

(iii) the type of bonding and the presence of intermolecular forces, where relevant