home *** CD-ROM | disk | FTP | other *** search
- What is meant by the mass deficit (in a helium atom, for example)?
- A. One of the protons has less mass than the others
- B. Some of the mass of the nucleus has been moved to the electron cloud
- C. Some of the mass has been lost in forming the nucleus
- D. The atomic mass is less than the true mass of the atom because the mass of the
- electrons is not included in the atomic mass.
-
- C
- Energy is required to form the nucleus. This energy is created by converting some of the mass of the nucleons to energy according to the relation: