Which statement is true?: - beta radioactivity is not found until ~Z = 82 (Pb)

- beta radioactivity tends to occur in isotopes with a lower neutron to proton ratio

- fission and alpha radioactivity are more common in heavier elements (Z > 82)

- fission isn't found in heavier elements (only Z < 40).

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1