Textbook Question
(a) Define atomic number and mass number.
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Ch.2 - Atoms, Molecules, and Ions
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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Table of contents
- Ch.1 - Introduction: Matter, Energy, and Measurement146
- Ch.2 - Atoms, Molecules, and Ions200
- Ch.3 - Chemical Reactions and Reaction Stoichiometry176
- Ch.4 - Reactions in Aqueous Solution155
- Ch.5 - Thermochemistry126
- Ch.6 - Electronic Structure of Atoms131
- Ch.7 - Periodic Properties of the Elements126
- Ch.8 - Basic Concepts of Chemical Bonding123
- Ch.9 - Molecular Geometry and Bonding Theories143
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces91
- Ch.12 - Solids and Modern Materials122
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics174
- Ch.15 - Chemical Equilibrium101
- Ch.16 - Acid-Base Equilibria139
- Ch.17 - Additional Aspects of Aqueous Equilibria146
- Ch.18 - Chemistry of the Environment72
- Ch.19 - Chemical Thermodynamics129
- Ch.20 - Electrochemistry142
- Ch.21 - Nuclear Chemistry101
- Ch.22 - Chemistry of the Nonmetals68
- Ch.23 - Transition Metals and Coordination Chemistry66
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry10
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Not the one you use?Change textbook
Chapter 2, Problem 24b
Consider an atom of 63Cu. b. What is the symbol of the ion obtained by removing two electrons from 63Cu?
Verified step by step guidance1
Identify the element: The element with the atomic number 29 is copper (Cu).
Determine the charge of the ion: Removing two electrons from a neutral atom results in a 2+ charge.
Write the symbol for the ion: The ion symbol is the element symbol followed by the charge as a superscript.
Combine the element symbol and charge: The ion symbol for copper with a 2+ charge is \( \text{Cu}^{2+} \).
Verify the ion symbol: Ensure the charge and element symbol are correctly represented as \( \text{Cu}^{2+} \).
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Atomic Structure
An atom consists of protons, neutrons, and electrons. The number of protons defines the element, while electrons determine the atom's charge and chemical behavior. In the case of copper (Cu), it has 29 protons and typically 29 electrons in its neutral state.
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Atom Structure
Ionic Charge
When an atom loses or gains electrons, it becomes an ion. Removing electrons results in a positive charge, as there are more protons than electrons. For copper, if two electrons are removed, the resulting ion will have a charge of +2, denoted as Cu²⁺.
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Isotopes
Isotopes are variants of an element that have the same number of protons but different numbers of neutrons. The notation 63Cu indicates that this isotope of copper has a mass number of 63, which is the sum of protons and neutrons. However, the isotopic identity does not affect the ionization process.
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Related Practice
Textbook Question
Consider an atom of 10B. (c) What is the symbol of the atom obtained by adding one neutron to 10B?
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Textbook Question
Consider an atom of 63Cu. (c) What is the symbol for the isotope of 63Cu that possesses 36 neutrons?
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Textbook Question
Consider an atom of 10B. (d) Are either of the atoms obtained in parts (b) and (c) isotopes of 10B? If so which one?
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Textbook Question
(b) Which of these can vary without changing the identity of the element?
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Textbook Question
Consider an atom of 63Cu. (a) How many protons, neutrons, and electrons does this atom contain?
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