A. Removal of a water molecule between each two units
Answer:
The answer is Sulphur and Nitrogen ion
B D and E. C isn't the answer because it is stopped.
Protons= 88
Neutrons= 138.
The weight of an element is comprised of entirely protons and neutrons. To get the protons look at the atomic number on the periodic table (88) and those are your protons. To get the neutrons take the weight of the isotope that you have and subtract the protons, giving you 138.