An unknown element is found to have three naturally occurring isotopes with atomic masses of 
and 
Which of the following is the unknown element?
Definitions:
Just-in-time Delivery
A supply chain management strategy that aims to reduce inventory and increase efficiency by receiving goods only as they are needed in the production process.
Logistics
The organization of tracking, moving, storing, and delivering cargo in a trucking operation.
ASE Certification
A certification granted by the National Institute for Automotive Service Excellence to individuals who demonstrate knowledge and proficiency in automotive repair and service.
Transit Bus Technicians
Skilled professionals responsible for the maintenance and repair of buses used in public transportation.
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