Problem is it wasn't designed to display fractions of proton masses. What gives it that pixelated look is that each isotope has an integer coordinate, since its coordinates are defined via number of nucleids vs number of protons.

Now the muon is only 11% of the proton mass, so that breaks the nice grid pattern. It also has a charge of -1 so that doesn't really correspond to the protons charge of +1.

You could modify the table, so the axis are total mass vs electrical charge. In that scheme muonium would go below the neutron line.

PS: Here is an interactive version of the table

So there is a goldilocks zone of a certain lack of O to slow the decomposition, but enough to keep the mineralization going at a rate that the corpse fossilizes?

Why is lack of oxygen a detriment to fossilization?

Partially filled wouldn't work?

Yep you are pretty much on the right track there. The latter part of the nozzle is mainly to match the gas pressure to the ambient pressure at the exit. Because as you point out the two should match up to provide the most thrust. The terms you want to look into are over/underexpanded plumes.

What are some animals that have olfactory receptors where we don't expect them?