In which type or types of radioactive decay does the mass number ...

[Pea0909berry]

In which type or types of radioactive decay does the mass number of the parent nucleus not change?
 
  A) electron capture only
  B) beta decay only
  C) alpha decay only
  D) beta decay and electron capture

Question 2

Climate models which have been developed over many decades
 
  A) completely fail to match real climate data
  B) match real climate data quite well
  C) match real climate data perfectly
  D) match real climate data, but only poorly

[nanny]

Answer to Question 1

D

Answer to Question 2

B