The Symbol for a Certain Isotope of Strontium Is $^{90}_{38}$ Sr What Is the Mass Number of This Isotope?
A)

question 70

Multiple Choice

The symbol for a certain isotope of strontium is $^{90}_{38}$ Sr. What is the mass number of this isotope?

• A) 38
• B) 52
• C) 88
• D) 90
• E) 128

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Definitions:

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A strategic planning method that organizations use to envision and develop strategies for multiple future scenarios.

Dynamic Environment

A situation or setting that is constantly changing and requires organizations or individuals to adapt quickly to new challenges and opportunities.

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A management strategy designed to enhance an organization's performance through the establishment of clear goals concurred upon by both the employees and management.