Can an isomer be both cis and trans? I didn't think so because cis = on same side, and trans = across. And in the case of isomers it means atoms on the same side of a double bond(cis), and atoms on different sides of a double bond (trans). So how can something be on the same side and still be across from each other? But I was reading an article and it said it was possible. Could you clarify this for me?

I request you to share an example.

I googled it, and the answer it gave was: Stereoisomers?

I don't understand that term...

Quote from: Avni on May 10, 2024, 10:51:51 PMI googled it, and the answer it gave was: Stereoisomers?

They have formulated the question merely for the sake of formulating it.
Cis and trans also falls in the category of stereoisomers. Stereoisomers are the molecules with same molecular formula ,same connectivity but different arrangement in space. There are two ways for assigning stereoisomers in alkene - one is cis -trans and other is E (trans) and Z (Cis).Cis and trans is only in the molecules in which the two of the groups are identical on doubly bonded carbon atoms. You will learn in detail about it in organic chemistry.
Here I am attaching an image in which they have different configuration as cis-trans but different as E and Z.   

Ok, thank you!