Boiling point and melting point vary for different substances In a solid, molecules are held together tightly by bonds, and simply vibrate.
(molecules; are held tightly; by bonds) Context(molecules are held tightly,List([74, 109))):(Boiling point and melting point; vary; for different substances)
molecules are held tightly,List([74, 109))
molecules Boiling point and melting point
are held tightly vary
by bonds
for different substances