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Nuclei (part-1)

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.

Feb 5, 2013 15:21 IST
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Nuclei (part-1)
Nuclei (part-1)

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?

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A atom, positive charge and mass are densely concentrated at the centre of the atom forming its nucleus. The overall dimensions of a nucleus are much smaller than those of an atom. The mass of an atom is very small, compared to a kilogram. One Amu is one twelfth of carbon 12 atom. Electron volt energy is defined as the energy gained by the electron when accelerated by a potential different of one volt.

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