What is the minimum energy an incoming electron must have to ...

[jwb375]

What is the minimum energy an incoming electron must have to knock a K shell electron (n = 1 ) out of an atom of molybdenum, which contains 42 protons?
 
  A) 34.4 keV B) 24.0 keV C) 10.1 keV D) 11.3 keV E) 44.0 keV
 
  A) 118 keV B) 5.19  107 eV C) 0.865 eV D) 164 MeV

Question 2

A highly ionized atom with Z = 5 has only one electron left around it, in its ground state. How much more energy is required to finish the job and have a bare nucleus?
 
  A) 13.1 eV B) 10.9 eV C) 340.0 eV D) 68.0 eV

[meow1234]

Answer to Question 1

B

Answer to Question 2

C