i didn’t mean to put this opps
 
        
             
        
        
        
You put precipitation in the wrong place the answer is D+A (number 4)
        
                    
             
        
        
        
In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s² 2s² 2p⁶, using the notation explained below.
 
        
             
        
        
        
Answer:
Compound B and D 
Explanation:
Both are good conductors of electricity.
 
        
             
        
        
        
Answer:
the atoms of the original substances gain, lose and even share their very own electrons. write the symbols of the elements that form the compound. Write down the valency, and lastly go over valencies. This is all I got so far. I hope this helps
Explanation: