Acircuit with small diameter connecting wires at al ow temperature will have the least electrical resistance

Not quite.  You're on the way, but you can do a better job
at reducing the resistance of the circuit.

Running it at low temperature is a good move, and will be effective.

But you should use connecting wires that have the LARGEST practical
diameter, not small ones. 

It won't lose or gain electrons if it's a covalent bond it shares the electrons with another atom or atoms. if it is an ionic bond it will lose the 3 electrons on the outer shell and become a positively charged ion.  credit goes to @sunshinebaby of answers.yahoo.com.