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What is the difference between an isotope and an i on? a. An isotope is defined by the relative number of protons and electrons, whereas an ion is defined by the number of protons and neutrons. b. An ion is defined by the relative number of protons and electrons, whereas an isotope is defined by the number of protons and neutrons. c. Two different ions must always correspond to two different elements, but two different isotopes could correspond to the same element.

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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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Section
BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 3, Problem 3SC
Textbook Problem
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What is the difference between an isotope and an i on?

a. An isotope is defined by the relative number of protons and electrons, whereas an ion is defined by the number of protons and neutrons.

b. An ion is defined by the relative number of protons and electrons, whereas an isotope is defined by the number of protons and neutrons.

c. Two different ions must always correspond to two different elements, but two different isotopes could correspond to the same element.

Interpretation Introduction

Interpretation:

The correct statement for difference between an ion and isotope is to be identified from the given options.

Concept introduction:

An atom consists of a nucleus and extranuclear space. The nucleus of an atom is composed of protons and neutrons, while the extra nuclear space contains electrons.

Atoms of an element can exist in more than one form. Each form is termed as an isotope and differs from other forms by the number of neutrons, while the number of protons and electrons are equal in all forms.

When an atom loses or gains an electron, it is termed as cation or anion, respectively. A cation bears a positive charge and has a greater number of protons than electrons. An anion bears a negative charge and has a lower number of protons than electrons.

Explanation of Solution

Reason for correct option:

The main difference between an isotope and an ion is that an ion involves a change in number of electrons. So, these are defined by number of protons and electrons.

Isotopes differ in number of neutrons, so they are defined by the number of protons and neutrons.

Hence, option (b) is correct...

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Chemistry In Focus
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