A molecular model contains one alkene molecule in which one carbon atom is represented by a green piece. The marked molecule is joined to neighbouring alkene molecules to model addition polymerisation.
How does forming the polymer affect the green piece?
It is transferred to a repeating unit formed from a neighbouring molecule
It is released from the chain as part of a separate small molecule
It is copied into the repeating units on either side of the marked molecule
It remains in the repeating unit formed from the marked molecule