• The molecules approach each other .
• As a result, these two elements are brought into proximity .
• Before two HC1 molecules can approach closely enough for interaction to be sufficiently strong, ...
• The ends of a six-carbon chain approach each other ( or draw close together ).
• The two points F and F' come ( close ) together as the solvent rate approaches its minimum value.
• The atoms are brought closer together .
• The peaks come closer and closer together .
• The particles draw ( or move ) closer together .