A100.-kilogram cart accelerates at 0.50 meter per second squared west as a horse exerts a force of 60. newtons west on the cart. what is the magnitude of the force that the cart exerts on the horse?

The force exerted on the cart of the horse is equal to the force exerted by the horse on the cart, so its magnitude is 60N

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.