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A fancy name for the third layer of crazy in an atom. Found in the third row of the Periodic table because it's too chaotic for the first two.
My chem teacher said the d-orbital is like the third row of a middle school lunch line, nobody knows where they're supposed to sit.
I failed the test because I thought the d-orbital was a new type of pizza topping.
My friend said the d-orbital is where atoms go to lose their minds.