Ar I did this I think i got it right on edunuty
        
             
        
        
        
Answer:
vigorous
Explanation:
As you go down group one of the periodic table, the reactions become and more vigorous.
 
        
             
        
        
        
Answer:
D
Explanation: this was easy for me
 
        
                    
             
        
        
        
Answer:
By giving electricity to copper compound solution.
Explanation:
Electrolysis is one of the major way of refined copper. The copper containing solution has two electrodes.i) positive electrodes called anode. ii) negative electrodes called cathode. When electricity is pass into the copper containing solution electrolysis process is starts and impure copper is formed in anode and pure copper is formed in cathode. 
So, We can get pure copper in cathode through electrolysis.
I Hope this will be helpful for you.
If this is helpful for you .Then choose this answer as brainliest answer.
 
        
             
        
        
        
Due to the variables that each inquiry has, Scientific inquiry follows a path of questioning and testing a hypothesis, however this changes in response to specific details.