The positive charge at one end of the chain will attract a free electron while the negative charge at the other end will repel free electrons.
(The positive charge at one end of the chain; will attract; a free electron; while the negative charge at the other end will repel free electrons) (the negative charge at the other end; will repel; free electrons)
The positive charge at one end of the chain the negative charge at the other end
will attract will repel
a free electron while the negative charge at the other end will repel free electrons
free electrons