The number of electrons in an atom of 
is ______________.
Definitions:
Anatomical Structures
The various organs and systems in the body, defined by their physical properties and locations.
Pubertal Process
The biological and physical changes that occur during puberty, marking the transition from childhood to adolescence.
Sexes
Categories, typically male or female, within which organisms are classified on the basis of their reproductive roles and functions.
Years
Units of time equivalent to 365 or 366 days, used in measuring duration and age, among other things.
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