Question

sodium bromide is a binary ionic compound. it is used to prevent the overgrowth of algae in ornamental ponds. write the chemical formula of sodium bromide. refer to a periodic table.

Explanation:

Step1: Identify ions

Sodium (Na) forms a +1 ion ($Na^+$), bromine (Br) forms a - 1 ion ($Br^-$).

Step2: Write formula

For a neutral compound, the charges must balance. Since the charges of $Na^+$ and $Br^-$ are equal in magnitude but opposite in sign, the chemical formula is $NaBr$.

Answer:

$NaBr$