Which postulate o

According to the law of conservation of mass, “Matter can neither be created nor destroyed in a chemical reaction”. This law gives the result to the postulate of Dalton’s atomic theory which states that “Atoms can neither be created and nor destroyed by physical and chemical changes.”

OR

Rutherford designed an experiment in which the fast-moving alpha particles were made to strike a very thin gold foil. Alpha particles were deflected by subatomic particles in the gold atoms. Rutherford’s ‘alpha (α) particles scattering experiment’ resulted in the discovery of the nucleus in the atom