[oxapentane]

Sorry to barge in into the thread, but regarding the isotopes with current pop-out style: As a person who lately started collaborating with NMR people I think it will be nice if one can filter them by half-life/abundance (e.g. to filter out anything that has natural abundance of 0 or below x), and then look at magnetic/quadrupole moment to see if resonance people can measure it).

But anyways, thanks for all the work you've done! I've been using it daily for the past 10-11 years, it is a great resource :D

[Lucent]

Wow, over a decade! I'm sure you have much feedback to offer. You've convinced me to change the way search works with fanned isotopes. Currently, searching for "infinity" under half-life will show stable elements or ">0" under abundance will show non-zero values by dimming those isotopes. Instead, I'll have it filter them out entirely rather than adjusting opacity.