Answer:
Melting
Explanation:
Once heat is added it will turn to a liquid
 
        
                    
             
        
        
        
<span><span>Mn<span>O<span>2<span>(s)</span></span></span>+<span>H<span>2<span>(g)</span></span></span>→Mn<span>O<span>(s)</span></span>+<span>H2</span><span>O<span>(g)</span></span></span></span>
        
             
        
        
        
Answer:
From the image the answer is 24.
 
        
                    
             
        
        
        
The correct answer to your question is noble gases are stable <span>due to having the maximum number of valence electrons their outer shell can hold. Meaning their outer shells are stable. 
Hope this helps let me know!</span>