Wiktionary
hydrogens
n. (plural of hydrogen English)
Usage examples of "hydrogens".
Compare this with a water molecule (H2O), which contains 3 atoms, 2 hydrogens and i oxygen.
Hence, if something (say, a passing asteroid) shoves on a hydrogen atom, it just takes off, saying nothing to other hydrogens nearby.
The first transformation is direct: two hydrogens and two neutrons combine to form one helium nucleus.
The combination of four hydrogens to make one helium thus released the extra .