When forming ions, nitrogen will gain or lose how many electrons, forming a cations or anions with a what charge?

Nonmetals form negative ions (anions). A nitrogen atom must gain three electrons to have the same number of electrons as an atom of the following noble gas, neon. Thus, a nitrogen atom will form an anion with three more electrons than protons and a charge of 3−.

Explanation:

have advanced

At equilibrium state, the water will have turned into ice.

Explanation:

An Equilibrium phase is defined as a stage when chemical potential of any component ( solid liquid or gas) present in the system remains steady with time. So, in this situation, because the system is perfectly insulated, no heat will be gained or lost. The water and ice are both at exactly 0 °C, then that temperature will remain constant. As time goes on, the water will freeze and the system will become all ice.