Sorry, F3H is not a real existing chemical substance. It does not obey the octet rule, which requires each atom to have eight electrons in its outermost shell for stability. Fluorine (F) has seven electrons in its outermost shell and can only accept one more electron, while hydrogen (H) has only one electron and can give or take one electron. Therefore, there is no way to combine three fluorine atoms and one hydrogen atom to form a stable compound.
Therefore, it is impossible to explain its name, atomic mass, molecular structure, ion structure, physical and chemical properties, common chemical reactions, and ways to prepare F3H.
We can only form compounds with one or two fluorine atoms bonded to a hydrogen atom, which are HF (hydrogen fluoride) or H2F2 (difluoride). Both have been thoroughly researched for their properties and reactions.