The atomic structure of the acetic acid is:
                        H     O
                        l       l
                H –
C – C – O – H
                        l
                        H
 
We can see from the structure that there are 2 interior
atoms, and these are all Carbon atoms.
The geometry is:
Tetrahedral on First Carbon
Trigonal Planar on Second Carbon
 
        
             
        
        
        
The electric and magnetic fields are generated by moving electric charges, the electric and magnetic fields interact with each other, the electric and magnetic fields produce forces on electric charges, the electric charges move in space. 
<h3>
 I hope it'll help you....</h3>
 
        
             
        
        
        
Out of the choices given, the part of the atom that forms chemical bonds are the outermost electrons. The correct answer is B.