covalent bonding, occurs in most non-metallic elements and in compounds of non-metals., diamond, the atoms form a 3D lattice, called a tetrahedron, ionic bonding, occurs in compounds formed from metals combined with non-metals., liquid, closely packed, graphite, made from layers of hexagonal rings of carbon, solid, vibrates in place, gas, free to move , metallic bonds, occurs in metallic elements and alloys., fullerenes, are spheres or squashed spheres of carbon atoms, polymer, are large molecules, made of ‘repeating units’ called monomers..

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