Which of the following conclusions couldnot be derived from Rutehrford's `alpha`-particle scattering experiment?

Which one of the following conclusions could not be derived from Rtherford's alpha - particle scattering experiments?

Which of the following conclusions could not be derived from Rutherford's α-particle scattering experiment?

Rutherford's alpha-particle scattering experiment discovered

Why do we use gold in Rutherford's alpha - particle scattering experiment ?