Which formula equation shows a reversible reaction

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

C3h8o3 - glycerol major species present when dissolved in water

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease