explain about amu or unified mass for solving questions.

Question

Mass concept of elements and their unified mass

Answer 1

Depending on the level of study (high school, college, advanced), the explanation will vary.  I will keep it simple unless you ask for more advanced explanations.  

 

The amu is considered to be obsolete, but for simplicity is used in many books and courses.  It used to be based on oxygen-16 but today has been changed and is based on carbon-12.  This now makes it the same or very similar (depending on level of study) to the unified atomic mass unit.

 

The unified atomic mass unit (u) is defined as 1/12 of the mass of an atom of carbon-12 (simplified definition).