33

rd

Session: Modern Physics III

Mass Energy Equivalence

• Recap

• 2

nd

classification of nuclei

– Nuclear reactions

– Binding energy & mass defect

– Stability Criteria

– Stability curve

2

nd

Classification of Nuclei

• Stable Nuclei & Unstable (Radioactive) Nuclei

• Concepts/Phenomena:

 Radioactivity

 Mass Energy Equivalence

• Two Important curves

• n v/s p (Chart of Nuclides)

• B.E. per nucleon v/s Atomic Mass number (A)

Rutherford’s Experiment on Radioactivity