If the primary ion is elastically scattered, the kinetic energy of the reflected primary ion will depend on which of the following?

If the primary ion is elastically scattered, the kinetic energy of the

1.	If the primary ion is elastically scattered, the kinetic energy of the reflected primary ion will depend on which of the following?
A.	Charge of the primary ion
B.	Charge of the surface ion
C.	Mass of the surface ion
D.	Number of surface ions
Answer» D. Number of surface ions