If you are going to try to find a sample of gold from a bucket of dirt collected from a mine, the best way to separate this mixture is by: A- filtration
B-evaporation
C- magnetic attraction
D-sifting

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.