It’s c, the toy car changes direction
        
                    
             
        
        
        
You can conclude that the solution is probably acidic because bases rarely react with metals.
        
             
        
        
        
The measurement of sound is in decibels.
        
             
        
        
        
Answer:
The answer to your question is: 20
Explanation:
Atomic number is the number of proton and atom has. Each element has a specific number of protons, if the number of protons change, then this is a new element.
Mass number is the number of protons and neutrons and atom has.
                        Mass number = protons + neutrons
Data
Number of protons = ?
Atomic number = 20
Then, 
            atomic number = number of protons = 20
 
        
             
        
        
        
To what I don’t see anything