If an atom has become a positive ion, it has A) gained an ...

[meagbuch]

If an atom has become a positive ion, it has
 
  A)
 
  gained an electron or electrons.
  B)
 
  lost an electron or electrons.
  C)
 
  gained a proton or protons.
  D)
 
  gained a proton and an electron.
  E)
 
  lost a proton or protons.

Question 2

What is the nuclear radius of 90Sr?
 
  A)
 
  4.0  10-15 m
  B)
 
  1.2  10-15 m
  C)
 
  1.1  10-13 m
  D)
 
  5.4  10-15 m
  E)
 
  3.3  10-13 m

[kristenb95]

Answer to Question 1

B

Answer to Question 2

D