What is the importance of the chapter Nuclei? Why do we study the chapter Nuclei? How many marks are carried by the chapter Nuclei in class 12 board examinations? What is the importance mass of a unit? What is one AMU? What is mass of an atom? What is one electron volt? What is the mass energy relation?
An atomic mass unit (u) is a unit of mass used to express atomic and molecular weights. One atomic mass unit (1u) is defined as one twelfth (1/12) of the mass of an atom of carbon-12.