3. A company that makes frying pans needs to
create a new substance to coat the pans. The
substance must have a high melting point. To create
this new substance, workers mixed together two
substances that melt at low temperatures in a
sealed container. The diagram above shows the
repeating groups of atoms that make up the two
starting substances.
After mixing, the workers found two substances that
melt at higher temperatures in the sealed container.
(Nothing had escaped.) Which of the diagrams to
the left shows the repeating groups of atoms that
make up the ending substances?