Question

Which of the following observations would indicate that a material is a pure substance? It does not dissolve in water. It changes color after heating. It cannot be physically broken down into different types of atoms. It can be physically broken down into different types of molecules.

Answer 1

Answer: The correct answer is C

Step-by-step explanation:

Answer 2

Pure substances cannot be separated into simpler substances. So It would be ; It cannot be physically broken down into different types of atoms.