Gases have no defined shape or volume.
You should test your hypothesis.
<span> Negative staining method is used to view viruses, bacteria, bacterial flagella, biological membrane structures, lipid aggregates and proteins or protein aggregates, which all have a low electron-scattering power. This method is used to view cells or certain organelles of cells more clearly under the microscope in the field of microbiology. </span>
0%?... i mean if 100 million years is half of its life then 300 million years surpasses its entire lifetime which would be 200 million years. Based off of this I don’t believe there’d be anything left