The shape and size of a nucleus can best be described as a. A ...

[tuffie]

The shape and size of a nucleus can best be described as
  a. A perfect sphere of diameter 0.4 nm.
  b. A perfect sphere of diameter 4 x 10^-18 m.
  c. A roughly spherical shape of diameter 4 x 10^-18 m.
  d. A roughly spherical shape of diameter 4 fm.

Question 2

Who among the following persons did not play an important role in the discovery of the neutron?
 

a. Henri Becquerel
  b. Walter Bothe and Herbert Becker
  c. James Chadwick
  d. Irene Curie and Frederic Joliot

[fffftttt]

Answer to Question 1

e. this is about the right size and description.

Answer to Question 2

Henri Becquerel was responsible for discovering the first radiation, which was not neutrons but rather alpha and beta particles.
a.

[tuffie]

Excellent

[ktidd]

Thanks for the timely response, appreciate it