Four substances, W\text{W}W, X\text{X}X, Y\text{Y}Y, and Z\text{Z}Z, are classified by their structure and the presence of delocalised electrons:
Which of the following sets of substances correctly identifies W\text{W}W, X\text{X}X, Y\text{Y}Y, and Z\text{Z}Z?
W=Magnesium\text{W} = \text{Magnesium}W=Magnesium, X=Graphene\text{X} = \text{Graphene}X=Graphene, Y=Benzoic acid\text{Y} = \text{Benzoic acid}Y=Benzoic acid, Z=Poly(ethene)\text{Z} = \text{Poly(ethene)}Z=Poly(ethene)
W=Magnesium\text{W} = \text{Magnesium}W=Magnesium, X=Silicon dioxide\text{X} = \text{Silicon dioxide}X=Silicon dioxide, Y=Buckminsterfullerene (C60)\text{Y} = \text{Buckminsterfullerene } (\text{C}_{60})Y=Buckminsterfullerene (C60), Z=Poly(phenylethene)\text{Z} = \text{Poly(phenylethene)}Z=Poly(phenylethene)
W=Potassium\text{W} = \text{Potassium}W=Potassium, X=Graphene\text{X} = \text{Graphene}X=Graphene, Y=Poly(ethene)\text{Y} = \text{Poly(ethene)}Y=Poly(ethene), Z=Benzoic acid\text{Z} = \text{Benzoic acid}Z=Benzoic acid
W=Potassium\text{W} = \text{Potassium}W=Potassium, X=Graphite\text{X} = \text{Graphite}X=Graphite, Y=Buckminsterfullerene (C60)\text{Y} = \text{Buckminsterfullerene } (\text{C}_{60})Y=Buckminsterfullerene (C60), Z=Poly(phenylethene)\text{Z} = \text{Poly(phenylethene)}Z=Poly(phenylethene)
