More recently, with the invention of powerful microscopes, humans have examined the atom itself and have seen how certain kinds of atoms combine with other kinds to form what are called molecules.
पाण्याच्या एका रेणूचे परीक्षण केल्यास, आणि विविध परिस्थितीत पाण्याच्या गुणधर्मांचे परीक्षण केल्यास काय दिसून येते?