Answer:Both atractive and repulsie
Explanation: 
 
        
             
        
        
        
Cation is formed when an atom of mercury (Hg) loses two electrons.
        
             
        
        
        
Answer:
It refers to the conventional sense of the elastic current
Explanation:
It is the traditional or the conventional sense of the elastic current as in the earlier days the experimenters and the scientist thought that the current moves out of the positive terminal or pole of the battery and enters through the negative pole or terminal of the battery. 
It is because of the direction of the current flow as thought in early days, the sentence refers to the conventional sense.
 
        
             
        
        
        
<span>longitudinal waves is the answer hope this helps</span>
        
                    
             
        
        
        
Answer:
a process that involves rearrangement of the molecular or ionic structure of a substance as distinct from a change in physical form or a nuclear reaction
Explanation:
please mark brainlest