- Substance y and substance z cannot be broken into simpler particles
- An element cannot be decomposed into two or more different substances by simple chemical methods
- So, substance y and substance z are elements

Therefore, substance y and substance z are elements
[Question]When Chemical X is added to a certain liquid, the chemical breaks into Substances Y and Z. It is not possible to break Substances Y and Z into simpler particles. Which statement is best supported by this evidence?
[Context]- Substance y and substance z cannot be broken into simpler particles 
- An element cannot be decomposed into two or more different substances by simple chemical methods