Respuesta :

transitionstate
Answer:
            Two Hydrogen Atoms

Explanation:
                     Chemical formula of Barium Hydroxide is;

                                                   Ba(OH)₂

Barium has a +2 charge and each hydroxide ion has -1 charge.

As there are two hydroxide ions in barium hydroxide, therefore a formula unit of barium hydroxide will contain two hydrogen atoms.

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