What is the atomic number of the isotope with the symbol 
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Definitions:
Disengagement Phases
Periods during which individuals gradually reduce involvement or detach from roles, relationships, or activities.
Invigoration
The process of feeling energized, refreshed, and stimulated to engage in activities.
Recovery
The process of returning to a normal state of health, mind, or strength following illness, addiction, or trauma.
Depression
A mental health disorder characterized by persistently depressed mood or loss of interest in activities, causing significant impairment in daily life.
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