Question

Which of these conditions most likely produces an unstable isotope?

A)equal numbers of protons and neutrons in a small nucleus

B)equal numbers of protons and neutrons in a large nucleus

more neutrons than protons in a nucleus

C)more electrons than protons in an atom

Answer 1

if there are a lot of protons in a nucleus there needs to be sufficient neutrons to reduce the electrostatic repulsion between like charges

with that being said, any ideas as to what the solution might be?