ELI5: Explain Like I'm 5

IUPAC

IUPAC is an organization that helps scientists communicate with each other by giving names to molecules. They make rules about how to name different kinds of molecules according to their structure so that everyone uses the same name for the same thing. It's like if we had a bunch of Legos and we needed to agree on what each piece was called so we could build something together.

For example, if we have a molecule that looks like a chain, we call it an "alkane." But if it has a double bond in it, we call it an "alkene." And if it has a triple bond, we call it an "alkyne." Basically, IUPAC helps us all speak the same language when it comes to naming molecules, so scientists can understand each other and build on each other's work.