abstract:The mass excess of a nuclide is the difference between its actual mass and its mass number in atomic mass units.Square It is one of the predominant methods for tabulating nuclear mass.
Conversely, BMI may underestimate body fat in a very small-framed person, someone who has very little muscle mass, or a person who carries his or her excess weight mainly around the midsection and has very thin arms and legs (the so called apple shaped body type).