What happened to the substances in the test tube during Step 2?
A. The heat started a chemical reaction between the iron and sulfur, making the compound
iron sulfide.
B. The heat started a chemical reaction between the iron and sulfur, making the element iron
sulfide.
C.
D.
The heat started a physical reaction between the iron and sulfur, making the solution iron
sulfide.
The heat started a physical reaction between the iron and sulfur, making the mixture iron
sulfide.
