The
formula of the compound
formed by 3A+ and 2B- is
Answers
Explanation:
Ba is the chemical symbol for the metal barium, and F is the chemical symbol for the nonmetal fluorine. The name of this compound is barium fluoride. Usually, metals and nonmetals form ionic compounds when chemically combined.
Since this is an ionic compound, its chemical formula is called a formula unit because there are no discrete molecules. A formula unit represents the lowest whole number ratio of elements in the compound.
Barium is a group 2 element. Group 2 elements form cations with a 2+charge. The formula for the barium ion is Ba+
Fluorine is a group of 17 elements. Group 17 elements form anions with a 1− charge. The formula for the fluoride ion is F−.
Ionic compounds are neutral, so the charges of the positive and negative ions must equal zero when added. So for everyBa2+ ion, two F− ions are needed. So the formula unit for barium and fluorine compound is BaF2.
Ba+2F→[Ba]2++2[F]−→BaF2