What properties prompted rutherford to use alpha particles and gold? (what set of experimental conditions would make it easiest to detect differences in atomic structure? )

Gold is  a stable heavy metal that is easily formed into uniform and thin sheets of measurable property. Alpha particles are relatively massive (compared to electrons) and so deflection is less dramatic and more easily measured. This is the property that prompted Rutherford to use alpha particles and gold. 
The particles that are positively charged were fired at the gold foil and when it reached that goldatoms’ nuclei, which are also positively charged, the particles were repelled back

It dont even matter because at the end of thre day we gone life like it ius s

It was necessary to redeem the world and he knew that his son was the only way