In interperting Rutherford's experiments on the scattering of alpha particle by thin foils, one must examine what were known factors, and what the experiment settle. Which of the following are 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 known before these experiments.
C. The experiment settled that size of the nucleus could not be larger than a certain value.
D. The experiment 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 know earlier, established by Rutherford's experiments.
c. Yes, the experiments said `r lt (Ze^(2))/(2 pi epsilon_(0) ((1)/(2) m v^(2)))`
This sets upper limit for `r`.
d. Lower limit of `r` not set.