Which would result in radioactive decay? check all that apply.

a)a neutron-to-proton ratio of 1: 1 in a small nucleus

b)a neutron-to-proton ratio of 1: 2 in a large nucleus

c)a nucleus that contains 90 protons and 100 neutrons

d)a nucleus that contains 8 protons and 8 neutrons

e)any isotope of the element uranium, which has atomic number 92

f)any isotope of the element potassium, which has atomic number 19

stupid i wont let you get a chance

explanation:

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.