Atomic Orbital Mnemonics
How does one remember SPDFGHIK…? Remembering the S through K orbitals is the trick. After K, it goes alphabetical. (But skipping S and P, because they’ve already been done.) My search for atomic orbital mnemonic devices only turned up one that had sufficient character to stick those eight seemingly arbitrary letters in my mind.
The Standard Mnemonic
The one I found was pretty good, though: