In the Following Diagrams,A Represents a Radioactive Isotope That Decays

question 15

Multiple Choice

In the following diagrams,A represents a radioactive isotope that decays into a new isotope,X.Each circle represents 1 mmol of atoms. t = 0: t = 25.0 s: Over the first 25.0 s,what is the disintegration rate of A?

• A)0.120 disintegrations per second
• B)1.81 × 10²¹ disintegrations per second
• C)3.00 disintegrations per second
• D)7.23 × 10¹⁹ disintegrations per second
• E)1.38 × 10^-20 disintegrations per second

---

Definitions:

NG Tube

A nasogastric tube, a medical device used to deliver food and medicine directly to the stomach through the nose.

Secure

To make something free from threat or risk; often refers to procedures or measures taken to ensure safety and protection.

Nasogastric Tube

A flexible tube inserted through the nose into the stomach, used for feeding or removing stomach contents.

Navel

The scar in the center of the abdomen, also known as the belly button, which marks the area where the umbilical cord was attached in utero.