Among the isotopes of all the elements (only non-radioactive), the n/p ratio is maximum for — Nuclear Chemistry and Radioactivity Chemistry Question

💡 Solution & Explanation

As atomic number increases, stable nuclei require a larger proportion of neutrons to counter proton-proton repulsion. Bismuth-209 is the heaviest stable nucleus, and thus has the highest n/p ratio (~1.52) among stable isotopes. Therefore, correct answer is C.