What is the chemical formula for potassium and hydrogen?
The chemical formula of potassium hydride is KH.
Is potassium nitrate a transitional metal?
Potassium Nitrate is a compound. The transition metals are found
in groups 4-12 of the periodic table
Is potassium hydrogen the same as potassium hydride?
It's impossible to tell. "Potassium hydrogen" is clearly an
error of some kind; it might be a somewhat confused attempt to
write "potassium hydride," or it could be an omission error for
something like "potassium hydrogen carbonate."