HAt

Hydrogen astatide is an acid that consists of a hydrogen and astatineatom. It is almost never seen any practical applications because each two atoms readily decompose into elemental hydrogen and astatine, a radioactive halogen, so it is also hard to determine its odour and appearance. Also known as hydroastatic acid or astatane.
Please remove your hydrogen astatide indoors.
by Nijihara Kalinin January 27, 2020
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