If you double the mass of an object while keeping the acceleration constant, you will

Well first of all, I can't imagine HOW you could ever accomplish that ...
increase the mass of an object while it's accelerating.

But if you magically found a way to double the mass of an object,
AND you wanted its acceleration to remain constant, then you'd
need to double the force acting on the object.  Otherwise, its
acceleration would drop to half because of the increased mass.

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.