So, let's see the elements that are unstable and radioactive include: Sh, Bz, Jr, Zb, Wd, and...? Ha looks like an inert element.
Sh proved to be a pretty stable and at times even catalytic element in the right environment. Many elements, placed under the wrong pressure and temperature, will appear unstable.
My bet is that's a mix of methane and a high percentage of hydrogen sulfide. No doubt a toxic and highly combustible substance best avoided at all costs.
Inert, or inept? (Removed when Roy's face is peering out at me, with a flag waving in the background, closing the 7:02 trailer tonight)
Wookie, when did you adopt Ronan's accent? "I hate it when HCP pahsses gahs...'e 'erts me nahsal pahssages"