In graphite, each carbon atom is bonded to ..........</ others, forming layers of ..........</ rings. One electron per atom becomes ............

True or False? Graphite acts as a lubricant because the covalent bonds between its layers are broken, allowing the layers to slide.

Why is graphite suitable for use as an electrode in electrolysis?

True or False? Silicon(IV) oxide (SiO2) is found as an impurity in iron ore and is removed during the blast furnace process.

Silicon(IV) oxide (SiO2) has properties similar to diamond because both have ..........</ covalent structures with ..........</ covalent bonds throughout.

True or False? Diamond and graphite are different elements because they have different structures and properties.