Textbook Question
Write isotopic symbols in the form X-A (e.g., C-13) for each isotope. b. the gold isotope with 119 neutrons
Ch.2 - Atoms & Elements
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217
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Table of contents
- Ch.1 - Matter, Measurement & Problem Solving118
- Ch.2 - Atoms & Elements106
- Ch.3 - Molecules and Compounds131
- Ch.4 - Chemical Reactions and Chemical Quantities56
- Ch.5 - Introduction to Solutions and Aqueous Solutions82
- Ch.6 - Gases114
- Ch.7 - Thermochemistry96
- Ch.8 - The Quantum-Mechanical Model of the Atom60
- Ch.9 - Periodic Properties of the Elements90
- Ch.10 - Chemical Bonding I: The Lewis Model89
- Ch.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO Theory85
- Ch.12 - Liquids, Solids & Intermolecular Forces51
- Ch.13 - Solids & Modern Materials47
- Ch.14 - Solutions90
- Ch.15 - Chemical Kinetics115
- Ch.16 - Chemical Equilibrium68
- Ch.17 - Acids and Bases136
- Ch.18 - Aqueous Ionic Equilibrium153
- Ch.19 - Free Energy & Thermodynamics93
- Ch.20 - Electrochemistry106
- Ch.21 - Radioactivity & Nuclear Chemistry74
- Ch.22 - Organic Chemistry140
Chapter 2, Problem 53c
Write isotopic symbols in the form X-A (e.g., C-13) for each isotope. c. the gold isotope with 122 neutrons
Verified step by step guidance1
insert step 1> Identify the element symbol for gold, which is 'Au'.
insert step 2> Determine the atomic number of gold, which is 79. This represents the number of protons in the nucleus.
insert step 3> Use the given number of neutrons, which is 122, to find the mass number. The mass number is the sum of protons and neutrons: Mass number = Atomic number + Neutrons.
insert step 4> Calculate the mass number: Mass number = 79 (protons) + 122 (neutrons).
insert step 5> Write the isotopic symbol in the form X-A, where X is the element symbol and A is the mass number.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Isotopes
Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons. This difference in neutron count results in varying atomic masses for the isotopes of the same element. For example, carbon has isotopes like carbon-12 and carbon-14, which differ in their neutron numbers.
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Isotopes
Isotopic Notation
Isotopic notation is a way to represent isotopes using the format X-A, where 'X' is the chemical symbol of the element and 'A' is the mass number, which is the sum of protons and neutrons in the nucleus. For instance, in the notation C-14, 'C' represents carbon, and '14' indicates that the isotope has a total of 14 nucleons (6 protons and 8 neutrons).
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Mass Number
The mass number of an isotope is the total count of protons and neutrons in its nucleus. It is crucial for identifying isotopes and is used in isotopic notation. For example, if a gold isotope has 122 neutrons and gold has 79 protons, its mass number would be 79 + 122 = 201, leading to the isotopic symbol Au-201.
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Related Practice
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