The Half-Life of Radioactive Technetium-99 Is 6

question 37

Multiple Choice

The half-life of radioactive Technetium-99 is 6.0 hours.Find the number of ⁹⁹Tc nuclei necessary to produce a sample of activity 1.0 µCi.(1 Ci = 3.7 x 10¹⁰ decays/second)

• A)8.0 x 10⁸
• B)1.2 x 10⁹
• C)2.1 x 10¹⁰
• D)3.4 x 10¹¹

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Definitions:

Episodic Memory

A type of long-term memory that involves the recollection of specific events, situations, and experiences, including the context and emotions associated with them.

Central Executive

A component of working memory model responsible for directing attention and coordinating mental resources.

Phonological Loop

A component of working memory model that deals with auditory information and preserves it in a verbal form.

Visuo-Spatial Sketchpad

A component of the working memory model that processes and stores visual and spatial information, used for navigation and understanding spatial relationships.