A very important experiment improved scientists’ understanding of the structure of matter. The experiment involved 
-particles being fired at a thin, gold foil. What happened?
All the -particles were absorbed by the nuclei of the gold atoms.
All the -particles were unaffected by the gold atoms.
Some of the -particles were attracted by the neutrons in the nuclei of the gold atoms.
Some of the -particles were repelled by the protons in the nuclei of the gold atoms.
