Answer
The chemical formula for strontium hydroxide is: $Sr(OH)_2$.
Work Step by Step
** Since the last name is "hydroxide", we can assume that it will act as a base in water.
"Strontium" is the full name for the element: $Sr$, which is from the group II of the periodic table. Therefore, its charge will be equal to $2+.$
"Hydroxide" represents the ion formed by a hydrogen and an oxygen atom, with a single negative charge: $OH^-$. (Hydroxide ion)
To balance the charge, the compound must have 2 $OH^-$, so the total charge is -2, and we can sum that with "+2" from the $Sr^{2+}$, to get 0.
$Sr(OH)_2$
