A Certain Substance Has a Half-Life of 5 $10 ^ { 10 }$

question 64

Multiple Choice

A certain substance has a half-life of 5.0 hours. How many nuclei of the substance are required to give an initial activity of 6.0 ?Ci? (1 Ci = 3.7 × $10 ^ { 10 }$ Bq)

• A)5.8 × \(10 ^ { 9 }\) nuclei
• B)8.5 × \(10 ^ { 8 }\) nuclei
• C)6.3 × \(10 ^ { 8 }\) nuclei
• D)3.2 × \(10 ^ { 9 }\) nuclei
• E)2.4 × \(10 ^ { 9 }\) nuclei

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Definitions:

Lateral Communications

Refers to the exchange of information and collaboration between colleagues or teams at the same organizational level.

Perceived Efficacy

An individual's belief in their capability to execute behaviors necessary to produce specific performance attainments.

Active Listener

A person who engages in listening by paying close attention, asking clarifying questions, and providing feedback.

Upward Communication

The flow of messages from lower to higher organizational levels.