Which would result in radioactive decay? check all that apply. a neutron-to-proton ratio of 1: 1 in a small nucleus a neutron-to-proton ratio of 1: 2 in a large nucleus a nucleus that contains 90 protons and 100 neutrons a nucleus that contains 8 protons and 8 neutrons any isotope of the element uranium, which has atomic number 92 any isotope of the element potassium, which has atomic number 19