Steps can be toward redesigning a heart of a (hydrogen bomb).
A team of astronomers may discover amounts of (hydrogen fluoride gas).
An aqueous solution can be constituted-of-or-filled-with (hydrogen iodide).
A (blood disorder) may be characterised by concentration of (hydrogen ions).
Oxidative addition can be constituted-of-or-filled-with hydrogen.
A series can be constituted-of-or-filled-with (hydrogen shifts).