The notes on p. 1-4 explain mass defect and binding energy (including how to calculate both, how to interpret binding energy curves, and sources of data -URLs valid as of 1/3/24) as needed in the IB Physics (2016) syllabus.P. 5-8 are annotated notes with solutions.Notes from textbooks and their sample calculations are on p.9-13.More on binding energy curves on p.14-16.Various other relevant material is on p.17-23.P. 24-25 are homework problems (with answers but not solutions, sorry).