Assertion: atom's number | /r/HasProperty | φ r = distance
Facets:
Source sentences:
text: = the number of alpha particles falling on unit area at an angle of deflection Φ r = distance from point of incidence of α rays on scattering material X = total number of particles falling on the scattering material n = number of atoms in a unit volume of the material t = thickness of the foil Q n = positive charge of the atomic nucleus Q α = positive charge of the alpha particles m = mass of an alpha particle v = velocity of the alpha particle