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

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Definitions:

Jean-Jacques Rousseau

An 18th-century philosopher, writer, and composer, known for his influential works on education, political philosophy, and the social contract.

Jean Piaget

A pivotal figure in developmental psychology who introduced the concept that children progress through a series of cognitive developmental stages.

Hypotheses

Possible explanations for phenomena, used to predict the outcome of research.

Theory

Coherent set of logically related concepts that seeks to organize, explain, and predict data.