Textbook Question
Indicate the number of protons and neutrons in the following nuclei: (c) neptunium-237.
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Ch.21 - Nuclear Chemistry
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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Table of contents
- Ch.1 - Introduction: Matter, Energy, and Measurement140
- Ch.2 - Atoms, Molecules, and Ions192
- Ch.3 - Chemical Reactions and Reaction Stoichiometry172
- Ch.4 - Reactions in Aqueous Solution156
- Ch.5 - Thermochemistry151
- Ch.6 - Electronic Structure of Atoms137
- Ch.7 - Periodic Properties of the Elements127
- Ch.8 - Basic Concepts of Chemical Bonding143
- Ch.9 - Molecular Geometry and Bonding Theories167
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces97
- Ch.12 - Solids and Modern Materials129
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics175
- Ch.15 - Chemical Equilibrium107
- Ch.16 - Acid-Base Equilibria127
- Ch.17 - Additional Aspects of Aqueous Equilibria133
- Ch.18 - Chemistry of the Environment88
- Ch.19 - Chemical Thermodynamics140
- Ch.20 - Electrochemistry137
- Ch.21 - Nuclear Chemistry99
- Ch.22 - Chemistry of the Nonmetals66
- Ch.23 - Transition Metals and Coordination Chemistry69
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry11
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Not the one you use?Change textbook
Chapter 21, Problem 9b
Indicate the number of protons and neutrons in the following nuclei: (b) 193Tl.
Verified step by step guidance1
Identify the element from the given symbol: Tl is the symbol for thallium.
Determine the atomic number of thallium from the periodic table, which is 81. This number represents the number of protons in the nucleus.
The given isotope is 193Tl, where 193 is the mass number (A).
Calculate the number of neutrons using the formula: Neutrons = Mass number (A) - Atomic number (Z).
Substitute the known values into the formula: Neutrons = 193 - 81.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Atomic Number
The atomic number of an element is the number of protons found in the nucleus of an atom. It uniquely identifies an element and determines its position on the periodic table. For example, thallium (Tl) has an atomic number of 81, meaning it has 81 protons.
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Atom Structure
Mass Number
The mass number of an atom is the total number of protons and neutrons in its nucleus. It is represented as a whole number and is crucial for identifying isotopes of an element. In the case of 193Tl, the mass number is 193, indicating the combined total of protons and neutrons.
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02:19Atomic Mass
Neutrons
Neutrons are neutral subatomic particles found in the nucleus of an atom, alongside protons. The number of neutrons can be calculated by subtracting the atomic number from the mass number. For 193Tl, with 81 protons, the number of neutrons is 193 - 81 = 112.
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01:38Neutron-to-Proton Plot
Related Practice
Textbook Question
Give the symbol for (c) gamma radiation.
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Textbook Question
All the stable isotopes of boron, carbon, nitrogen, oxygen, and fluorine are shown in the accompanying chart (in red), along with their radioactive isotopes with t1>2 7 1 min (in blue). (b) Which radioactive isotopes are most likely to decay by beta emission? [Sections 21.2, 21.4, and 21.5]
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