Answer
1 Barium (Ba) atom
2 Chlorine (Cl) atoms
Work Step by Step
In the formula $BaCl_{2}$, there is only 1 Barium atoms because there is no subscript beside "Ba" indicating that there is only one of that atom. However, beside the chlorine atom, there is a subscript that says 2. Therefroe, there is one Ba atom and 2 Cl atoms.
