Which uranium isotope has the largest cross section for slow ...

[segrsyd]

Which uranium isotope has the largest cross section for slow neutrons?
 
  A) U-236
  B) U-238
  C) U-237
  D) U-235
  E) U-239

Question 2

Marie & Pierre Curie
 
  A) discovered radioactivity.
  B) proposed the plum-pudding model.
  C) proposed the tiny central nucleus idea.
  D) observed back-scattering from nuclei.
  E) discovered radium and polonium.

[Pariscourtney]

Answer to Question 1

D

Answer to Question 2

E

[segrsyd]

Great answer, keep it coming

[Missbam101]

Thanks for the timely response, appreciate it