According to Yukawa's meson theory, the strong attractive forces between unlike nucleons (a proton a — Nuclear Chemistry and Radioactivity Chemistry Question

💡 Solution & Explanation

Meson theory postulates that the attractive forces between a proton and a neutron are caused by the oscillation and exchange of charged pi-mesons ($\pi^+$ or $\pi^-$). Neutral mesons ($\pi^0$) mediate forces between like particles (p-p or n-n).