An element in group two has two valence electrons. when forming a chemical bond it will most likely (gain, lose, share, or not react) electrons

Lose electrons - electrons want to fill their outer valence shell, so sometimes instead of gaining it is easier to lose some and have a filled outer shell

Explanation:

Balance is achieved when a reaction is in equilibrium.

At equilibrium, the rate of forward reaction is equal to the rate of backward or reverse process.