Quiz is "closed book" except for PT & calculator. If a question requests an explanation, there may be no credit unless you have provided an explanation.

1. Consider the (imaginary) ions Q²⁺ and X^-. Give the formula of the compound that they would form.

2. Consider the (imaginary) ions Q²⁺ and Z^3-. Give the formula of the compound that they would form.

3. Look at the PT. What charge would you expect for a calcium ion? How do you know -- based on the PT?

4. Potassium carbonate is K₂CO₃.

a. What is the formula of a carbonate ion? (Whenever you write an ion, be sure to include the charge -- both sign and magnitude.)

b. What is the formula of sodium carbonate?

c. What is the formula of calcium carbonate?

d. What is the formula of iron(II) carbonate?

e. What is the formula of iron(III) carbonate?