Question

the correct name for the compound that has the formula bacl₂ is...
select one:
a. bartde chlorine.
b. barium chloride.
c. barium chlorine.
d. barium chlorite.

when the calcium ion, ca⁺², combines with the iodide ion, i⁻, the formula for the compound is...
select one:
a. cal
b. cal₂
c. cal₃
d. ca₂i

Explanation:

Step1: Name ionic compound (first question)

For ionic compounds with a group 2 metal (Ba²⁺) and halide ion (Cl⁻), name the cation first, then the anion with "-ide" suffix. $\text{BaCl}_2$ is barium chloride.

Step2: Write ionic formula (second question)

Calcium ion is $\text{Ca}^{2+}$, iodide ion is $\text{I}^-$. Balance charges: 2 negative charges needed to cancel 2 positive charge, so formula is $\text{CaI}_2$.

Answer:

1. b. Barium chloride.
2. d. $\text{CaI}_2$