The chemicals are reactive with one another
        
                    
             
        
        
        
Well you didn’t post any but I’m hoping that either plastic, lead, wood, glass, or paper, are an option.
        
             
        
        
        
Answer:
<h3>Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances.</h3>