Somehow, wow's Yankee Doodle reminded me of Honcl Brif, the long lost uncle a high school chemistry teacher taught me about. It's the elements that, when not combined with other things, form two atom molecules.
Hydrogen
Oxygen
Nitrogen
Clorine
Bromine
Iodine
Fluorine
I find it interesting that many of these mnemonics don't, on the face of them, seem very memorable. My pi mnemonic, My two rats leap... is a classic example. In that case there are even elements in the mnemonic phrase that have to be ignored and I don't have any problem remembering which ones they are. On the other hand, I have been unable to extend the mnemonic past the 35 digits that I have mastered.
