In interpreting Rutherford's experiments on the scattering of alpha particles by thin foil, one must examine what were known factors, and what the experiment settle. Which of the following is true in this context?

Options

A. The number of electrons in the target atoms (i.e., `Z`) was settled by these experiments
B. The validity of Coulomb's law for distance as small as `10^(-13)` was knows before these experiments
C. The experiments settled that size of the nucleus could not be larger than a certain value
D. The experiments also settled that size of the nucleus could not be smaller than a certain value

Answer

C

Explanation

(a) `Z` was taken from `X-ray` scattering experiments
(b) Validity not known earlie, eastablished by Rutherford experiments
(c ) Yes, the experiments said `r lt (Ze^(2))/(E)` set upper limit for `r`
(d) Lower limit of `r` not set.