What's the difference between Cis/Trans and Z/E? Do they mean different things? And are they attributed differently. From what I understood, Cis/Trans are about Alkenes? Otherwise, when would it be appropriate to use Cis/Trans and when would it be appropriate to use Z/E? Also, what would happen if 2 high priority groups were attached to the same Carbon (Let's say we have Br and Cl attached to Carbon #2 while Carbon #1 only has 2 Hydrogen attached to it )Would it be Cis or Trans (Z or E?) since I've been taught to split the molecule parallel to the double bond? And what would happen if both groups were of equal priority (Instead of Br and Cl, it's 2 Br)?