The postulate of Dalton's atomic theory which still holds is that

The postulate of Dalton's atomic theory which still holds is that

Answer Details

The postulate of Dalton's atomic theory which still holds is that "atoms can neither be created nor destroyed". This means that in a chemical reaction, the total number of atoms of each element remains constant, and the atoms themselves are not transformed into atoms of other elements. This idea is now known as the law of conservation of mass.