Question

choose the symbol for the barium cation.
select all that apply
a ba²+
b ba++
c br-
d bro₃-

Explanation:

• Barium has the symbol \(Ba\).
• Cations are positively - charged ions.
• Barium is in Group 2 of the periodic table. Elements in Group 2 tend to lose 2 electrons to form cations with a \(+ 2\) charge. So the correct symbol for the barium cation is \(Ba^{2+}\).
• \(Ba^{++}\) is an incorrect notation for the barium cation. The standard notation uses the number \(2\) to represent the \(+2\) charge as \(Ba^{2+}\).
• \(Br^{-}\) is the bromide anion (not a barium species).
• \(BrO_{3}^{-}\) is the bromate anion (not a barium species).

Answer:

A. \(Ba^{2+}\)