Question

what is H-ion in brief​

Answer 1

The hydrogen nucleus is made up of a particle carrying a unit positive electric charge, called a proton (q.v.). ... In common usage, the term hydrogen ion is used to refer to the hydrogen ion present in water solutions, in which it exists as the combined molecule H. +· H2O. The formula H.

Answer 2

When acid dissolve in water it form hydrogen ion. It is know as H-