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General, Organic, and Biological C...

7th Edition
H. Stephen Stoker
Publisher: Cengage Learning
ISBN: 9781285853918

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Chapter
Section
BuyFindarrow_forward

General, Organic, and Biological C...

7th Edition
H. Stephen Stoker
Publisher: Cengage Learning
ISBN: 9781285853918
Chapter 4.4, Problem 2QQ
Textbook Problem
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Which of the following is the correct symbol for an atom of X that has gained three electrons?

  1. a. X3+
  2. b. X3−
  3. c. 3X
  4. d. no correct response

Interpretation Introduction

Interpretation:

The correct symbol for an atom of X that has gained three electrons has to be identified among the given options.

Concept Introduction:

Atoms are composed of three types of particles called subatomic particles.  They are as follows:

  • Protons: Positively charged particles in an atom.
  • Neutrons: Neutral charged particles in an atom.
  • Electrons: Negatively charged particles in an atom.

The neutral atom has equal number of protons and electrons.  Gaining or loosing of electrons of an atom form ions.  Negative charged ions are formed by the gaining of one or more electrons and it has more electrons than protons.  Positive charged ions are formed by loss of one or more electrons and it has more protons than electrons.

Explanation of Solution

Reason for correct option:

The charge on an ion depends on the number of electrons that are lost or gained. If an atom gains three electrons, then the symbol of ion is X3-.  Hence, the correct option is (b).

Reason for incorrect options:

Option (a) tells that X3+ is the correct symbol for an atom of X that has gained three electrons

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Chapter 4 Solutions

General, Organic, and Biological Chemistry
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