Atoms in substances

This task is about choosing the best diagram to represent the arrangement of atoms in 4 different substances.
The following diagrams represent five different arrangements of atoms. 
molecules-image-A.png
molecules-image-B.png
molecules-image-C.png
molecules-image-D.png
molecules-image-E.png
In these representations oxygen is given the white symbol and carbon the black symbol.

Question

a)  Which diagram shows water?  (Select one)

    • molecules-image-A.png

    • molecules-image-B.png

    • molecules-image-C.png

    • molecules-image-D.png

    • molecules-image-E.png

Question

b)  Which diagram shows graphite?  (Select one)

    • molecules-image-A.png

    • molecules-image-B.png

    • molecules-image-C.png

    • molecules-image-D.png

    • molecules-image-E.png

Question

c)  Which diagram shows oxygen?  (Select one)

    • molecules-image-A.png

    • molecules-image-B.png

    • molecules-image-C.png

    • molecules-image-D.png

    • molecules-image-E.png

Question

d)  Which diagram shows carbon monoxide?  (Select one)

    • molecules-image-A.png

    • molecules-image-B.png

    • molecules-image-C.png

    • molecules-image-D.png

    • molecules-image-E.png