The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is __________ amu. 
Definitions:
Sensitive
Having a heightened awareness of, and responsiveness to, the emotions and needs of others or oneself.
Securely Attached
A term from attachment theory describing individuals who have healthy, trusting relationships, often stemming from positive early life experiences.
Acquiring Language
The process by which humans learn to communicate using verbal language, typically occurring in early childhood through natural exposure and interaction with others.
Womb
The organ in female mammals where offspring are conceived and in which they gestate before birth; the uterus.
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