What happens to an atom when it gains two electrons

In this reaction n2o4(g)→2no2(g) what changes in color would you expect as pressure is increased at a constant temperature

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

The time that is taken by neptune once around the sun is called