Question

Natural radioactive nuclei are nuclei of high mass number. Why?​

Answer 1

Answer:

Natural radioactivity is displayed by heavy nuclei beyond lead in the periodic table because of relatively low binding energy per nucleon as 7.6 MeV. Hence to attain greater stability.

Answer 2

Natural radioactive nuclei are nuclei of high mass number because nucleon is small compared to stable nuclei and the neutron to proton ratio is different compared to stable nuclei.

• When the mass number of natural radioactive nuclei is more, they undergo radioactive decay so they attain a large value of binding energy per nucleon.
• They will also gain good stability, this is the main reason why these radioactive nuclei have high mass numbers.
• Radioactive decay means the emission of energy in the form of ionization energy.
• An unstable atom loses energy to its surrounding. Due to this, parent nuclei changes to daughter nuclide.
• There are two types of radioactive radiation "alpha" and "beta" radiations.
• These radiations are important for various human activities.