What is the name of the particle having the following atomic notation: 
He?
Definitions:
Robert Selman
A researcher known for his work in the field of developmental psychology, particularly regarding the stages of social understanding in children.
Stale Food
Food that has lost its freshness and become dry, hard, or spoiled due to exposure to air or lapse of time.
Explains
Provides information or details about something to make it understandable.
Social Cognitive Theory
A theory of learning and social behavior which proposes that new behaviors can be acquired by observing and imitating others.
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