Textbook Question
How many protons, neutrons, and electrons are in each of the following atoms? (a)
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Ch.2 - Atoms, Molecules & Ions
McMurry8th EditionChemistryISBN: 9781292336145
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Table of contents
- Ch.1 - Chemical Tools: Experimentation & Measurement170
- Ch.2 - Atoms, Molecules & Ions160
- Ch.3 - Mass Relationships in Chemical Reactions169
- Ch.4 - Reactions in Aqueous Solution199
- Ch.5 - Periodicity & Electronic Structure of Atoms102
- Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory92
- Ch.7 - Covalent Bonding and Electron-Dot Structures61
- Ch.8 - Covalent Compounds: Bonding Theories and Molecular Structure59
- Ch.9 - Thermochemistry: Chemical Energy122
- Ch.10 - Gases: Their Properties & Behavior155
- Ch.11 - Liquids & Phase Changes54
- Ch.12 - Solids and Solid-State Materials73
- Ch.13 - Solutions & Their Properties120
- Ch.14 - Chemical Kinetics98
- Ch.15 - Chemical Equilibrium125
- Ch.16 - Aqueous Equilibria: Acids & Bases110
- Ch.17 - Applications of Aqueous Equilibria147
- Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium86
- Ch.19 - Electrochemistry154
- Ch.20 - Nuclear Chemistry96
- Ch.21 - Transition Elements and Coordination Chemistry156
- Ch.22 - The Main Group Elements187
- Ch.23 - Organic and Biological Chemistry51
Chapter 2, Problem 103
Write symbols for the following isotopes:(a) Z = 58 and A = 140 (b) Z = 27 and A = 60
Verified step by step guidance1
Identify the element using the atomic number (Z). For (a), Z = 58 corresponds to the element Cerium (Ce) on the periodic table.
Write the isotope notation for Cerium with the given mass number (A = 140). The notation is written as \( ^{140}_{58}Ce \).
Identify the element using the atomic number (Z). For (b), Z = 27 corresponds to the element Cobalt (Co) on the periodic table.
Write the isotope notation for Cobalt with the given mass number (A = 60). The notation is written as \( ^{60}_{27}Co \).
Review the isotope notation: The superscript (A) is the mass number, and the subscript (Z) is the atomic number, followed by the element symbol.
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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 (atomic number, Z) but different numbers of neutrons, resulting in different mass numbers (A). For example, carbon-12 and carbon-14 are isotopes of carbon, with 6 and 8 neutrons, respectively.
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Isotopes
Atomic Number (Z)
The atomic number (Z) is the number of protons in the nucleus of an atom, which defines the element and its position in the periodic table. It determines the chemical properties of the element and its identity; for instance, an element with Z = 27 is cobalt.
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Mass Number (A)
The mass number (A) is the total number of protons and neutrons in an atom's nucleus. It is used to distinguish between different isotopes of the same element. For example, if an element has Z = 27 and A = 60, it has 27 protons and 33 neutrons (60 - 27 = 33).
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Related Practice
Textbook Question
How many protons, neutrons, and electrons are in each of the following atoms? (c)
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Textbook Question
How many protons, neutrons, and electrons are in each of the following atoms? (b)
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Textbook Question
Give the names and symbols for the following elements:(a) An element with atomic number 6 (b) An element with 18 protons in its nucleus (c) An element with 23 electrons
Textbook Question
The radioactive isotope cesium-137 was produced in large amounts in fallout from the 1985 nuclear power plant disas-ter at Chernobyl, Ukraine. Write the symbol for this isotope in standard format.
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