The mass number of an atom is obtained by totaling the number of and
a) electrons and protonselectrons
b) neutronsprotons and neutrons
c) neutrons and isotopes

uranium-238 i believe is your answer

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?