BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

Solutions

Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 16, Problem 11SQ
Textbook Problem
143 views

If the half-life of a radioisotope is 20,000 years, then a sample in which three-quarters of that radioisotope has decayed is ______ years old.

  1. a. 15,000
  2. b. 26,667
  3. c. 30,000
  4. d. 40,000

Summary Introduction

Introduction: Half-life is the time taken for one-half of atoms of radioactive isotope to decay which is a characteristic of a radioisotope. The radiometric dating is a technique by which the fossils or age of a rock can be determined using the half-life calculations.

Explanation of Solution

Reason for correct answer:

Half-life is the time taken for one-half of atoms of radioactive isotope to decay. Given that the half-life of a radioisotope is 20,000 years. This means that the real life of that radioisotope will be 40,000, which will be one-half of atoms that has decayed.

Option d. is given as “40,000”.

Half-life is the time taken for one-half of atoms of radioactive isotope to decay.

Hence, the correct answer is option d.

Reason for incorrect answer:

Option a. is given as “15,000”...

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Textbook Solutions

Find more solutions based on key concepts
Show solutions add
This class will give you the skills to learn how to separate legitimate nutrition claims from those that are qu...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What is the first element of the scientific method?

An Introduction to Physical Science

In what way has biotechnology had an impact on agriculture in the United States?

Human Heredity: Principles and Issues (MindTap Course List)

Why did people think an ocean was deepest at its center? What changed their minds?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin

Two balls with masses M and m are connected by a rigid rod of length L, and negligible mass as shown in Figure ...

Physics for Scientists and Engineers, Technology Update (No access codes included)

What evidence can you give that the Atlantic Ocean is growing wider?

Foundations of Astronomy (MindTap Course List)