The element X has two naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is ________ amu. 
Definitions:
Psychology Ph.D.s
Advanced degree focusing on the study of the mind and behavior, awarded after several years of postgraduate study.
Sodium Salts
Compounds that result from the replacement of the hydrogen ion of an acid with a sodium ion.
Body Damage
Physical harm that impairs the function or structure of a part of the body.
Machinery Operation
The process or action of working with mechanical devices to perform a specific task or function.
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