Answer:
[tex]H^{-}[/tex] or [tex]H^{+}[/tex]
Explanation:
General electron shell distribution id 2 - 8 - 18
Now hydrogen has 2 electrons in its outermost shell. The only it can become a hydrogen ion is either by gaining one electron or by loosing one electron. Hydrogen atom looses one electron to become a positively charged ion called the cation and can gain one extra electron to become a negatively charged ion called the anion.