Which of the following species or ions contain (a) a
C3 axis but no �h plane, and (b) a C3 axis and a �h
plane: NH3; SO3; PBr3; AlCl3; [SO4]
2�; [NO3]
�?
(a) PBr3, AlCl3, [NO3]-
(b) NH3, SO3, [SO4]2-
C3 axis but no �h plane, and (b) a C3 axis and a �h
plane: NH3; SO3; PBr3; AlCl3; [SO4]
2�; [NO3]
�?
(b) NH3, SO3, [SO4]2-