Science fair? Physical science? 8th grade? help!?

The number on the periodic table is not the atomic mass its the average atomic mass because of all the different isotopes, the average atomic mass depends on the number of the protons and the neutrons (we don't count the electrons because they are so light compared to the protons and neutrons) so if there is more neutrons on the element before the one after it then the one after it has an isotope that is the most of that element with less neutrons then the one before it.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.