What is the missing symbol in this plutonium fission reaction? 
Definitions:
Expertise
The skill, knowledge, or proficiency acquired through experience or education in a particular field.
Projects
Temporary endeavors undertaken to create a unique product, service, or result, characterized by defined objectives, scope, and time frames.
Interdependence
The extent to which team members rely on each other to complete their work tasks.
Surgical Team
A group of medical professionals, including surgeons, anesthesiologists, and nurses, working together during a surgical operation.
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