Question

Which describes Ernest Rutherford’s experiment?
Positive particles are fired at gold foil. Most bounce back, but some pass through.
Negative particles are fired at gold foil. Most bounce back, but some pass through.
Positive particles are fired at gold foil. Most pass through, but some bounce back.
Negative particles are fired at gold foil. Most pass through, but some bounce back.

Answer 1

"Positive particles are fired at gold foil. Most pass through, but some bounce back."

Rutherford used positively charged alpha particles; most went straight through because atoms are mostly empty space, but a few were strongly deflected (even back) by a small, dense positive nucleus.