Question

what is H- ions in brief​

Answer 1

H- is an anion of hydrogen .the hydrogen get one negative charge after gaining one electron to get nearest Nobel gas configuration ie hellium

Answer 2

Hydrogen ion, strictly, the nucleus of a hydrogen atom separated from its accompanying electron. The hydrogen nucleus is made up of a particle carrying a unit positive electric charge, called a proton (q.v.). The isolated hydrogen ion, represented by the symbol H+, is therefore customarily used to represent a proton.