Answer : The formula of the binary ionic compound is [tex]BeCl_2[/tex].
Explanation :
- For the ionic compound between [tex]Be^{2+}[/tex] ions and [tex]Cl^-[/tex] ions, we see that the charges on [tex]Be^{2+}[/tex] ions and [tex]Cl^-[/tex] are different, 2+ charge on beryllium ion and 1- charge on chloride ion.
- The ratio of beryllium ion and chloride ion are given i.e 1:2. That means 1 beryllium ion and 2 chloride ions are combined to form a compound.
- Now to balance the charges with the lowest number of ions possible. So, two chloride ions to balance the charge on one beryllium ion.
Therefore, the formula of the binary ionic compound is [tex]BeCl_2[/tex].
