Nothing Is As It Should Be

Every chemistry student thinks they've got it figured out: learn the periodic table, memorize the trends, understand the rules. Then you discover the exceptions. Okay, fine. But wait—there are exceptions within the exceptions? And then... exceptions to those?

That increasingly disturbed cat perfectly captures your face as you realize the periodic table is less of a organized system and more of a suggestion box that atoms occasionally ignore. Chromium and copper deciding to steal electrons from their d-orbitals? Sure, why not. Noble gases forming compounds? Obviously. Hydrogen being a metal under enough pressure? At that point you just accept that chemistry is chaos with footnotes.

Every textbook should just come with a disclaimer: "Rules apply until they don't, which is often, and we're sorry."