Question

What did Ernest Rutherford's experiment of a beam of alpha particles aimed

at a sheet of gold foil lead him to conclude?
A. The theory that atoms were the building block of all matter was
correct.
B. The majority of the atom's mass and its positive charge are
concentrated in the atom's center.
C. An electron has a larger mass than the alpha particles, causing
them to reflect upon collision.
D. J.J. Thomson's theory of electrons suspended in a sea of
positively charged particles was correct.

Answer 1

B - Only a concentration of mass in the nucleus could explain the deflection of the incident particles.