It contains neutrons, which have no charge. Protons which have a positive charge and electrons which have a negative charge. These are all called subatomic particles
        
             
        
        
        
From the graph. the answer is
A. supergiants
        
                    
             
        
        
        
Answer:
phosphorus.
Explanation:
The atomic number of phosphorus is 15 so the protons will be 15. 
 
        
                    
             
        
        
        
Chemical properties is when a material undergoes a chemical change or reaction like a nail rusting and a physical change can be observed without changing the material like temperature, color, texture, odor,etc.