Biology
Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 2, Problem 1MC

Which of the following is false?

  1. a. An dement is defined by its atomic number.
  2. b. Ninety-two elements occur naturally.
  3. c. An atom consists of subatomic particles.
  4. d. Electron shells Increase in energy closer to the nucleus.
Expert Solution & Answer
Check Mark
Summary Introduction

Introduction:

An atom represents the basic structural unit of elements. Atoms are constituted of subatomic particles which include neutrons, protons, and electrons. An atom contains equal numbers of electrons, protons, and neutrons which makes atom neutral or uncharged as a whole. An element is a substance that cannot be separated or converted into a simpler form. All matter in environment is formed from combination of different elements or same elements. There are ninety two different elements that occur naturally.

Answer to Problem 1MC

Correct answer:

Electrons shells increase in energy closer to the nucleus is a false statement. Therefore, option (d) is correct.

Option (d) is given as “Electrons shells increase in energy closer to the nucleus”.

Explanation of Solution

Justify reason for the correct statement:

Electrons play important role in interactions among atoms. They can capture and release energy, and they also forms the bond that links atoms together into molecules. Electrons revolve around the nucleus in the electron shells. Each electronic shell has a specific energy associated with it. Electron shells which are farthest away from the nucleus have the greatest amount of energy. Electrons shell decrease in energy closer to the nucleus.

Hence, option (d) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as “An element is defined by its atomic number”.

Any element present in nature is defined by its atomic number, it is a true statement. Hence, it is a wrong answer.

Option (b) is given as “Ninety two elements occur naturally”.

There are ninety two different elements that occur naturally, it is also a true statement. Hence, it is a wrong answer.

Option (c) is given as “An atom consists of subatomic particles”.

An atom consists of subatomic particles which include electrons, protons, and neutrons, this statement is also true. Hence, it is a wrong answer.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

Electron shell increase in energy closer to the nucleus is a false statement because an electron shell has maximum energy when it is farthest away from the nucleus.

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Students have asked these similar questions
Atoms are incredibly tiny, so small that most microscopes can't even see them, but atoms themselves are made of even smaller particles: protons, neutrons, and electrons. Which of the following describes where protons are located in an atom?   A. A shell   B. The nucleus   C. Both the nucleus and a shell
Which of the following statements is incorrect? a. Isotopes have the same atomic number and different mass numbers. b. Atoms have about the same number of electrons as protons. c. All molecules consist of atoms. d. Free radicals are dangerous because they emit energy
What is an alloy? A. A compound of two metals B. An element of two metals C. A mixture of two metals D. A molecule of two metals

Chapter 2 Solutions

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