Answer:
D
Explanation:
I think but it is an better attempt than the other guy answer.
An ionic compound is made up of a metal and a nonmetal. This eliminates answer choice A, C, and D because both of the elements listed are nonmetal.
Your correct answer is B) One atom of calcium and two atoms of chlorine. This is because calcium is a metal, and chlorine is a nonmetal.
The answer is B) heat will flow from the water to the copper until they both reach the same temperature
