Concept explainers
Interpretation:
Thallium’s
Concept introduction:
Thallium is a gray composition metal that is not in Free State. The average atomic mass of thallium is 204.38 amu.
Also,
Atomic mass of an atom = Atomic Number + Number of Neutrons
Answer to Problem 10STP
Option (A) A naturally occurring sample of thallium contains both isotopes.
Explanation of Solution
Reason for correct option:
Thallium is a metal that is not found in Free State and it always contain a mixture of thallium-203 (203TI81) and thallium-205 (205TI81) in its composition. Thus, thallium is the natural metal found with two isotopes that are thallium-203 (203TI81) and thallium-205 (205TI81).
Reasons for incorrect options:
(B) Thallium-203 isotope has 122 protons and Thallium-205 has 124 protons.
- This is wrong because the thallium-203 isotopes have atomic number 81 and mass number 203. So, it contains 81 protons, 81 electrons and 122 neutrons.
- Thallium-205 isotopes have atomic number 81 and mass number 205. So, it contains 81 electrons, protons and 124 neutrons.
(C) The most common atom of thallium has a mass of 204.48 amu.
- This statement is wrong because thallium has mass number 204.38 amu .
D) Thallium-203 and thallium-205 both have 81 neutrons.
- This statement is wrong because Thallium-203 and thallium-205 both have 81 protons and electrons. The number of neutrons is different.
Chapter U1 Solutions
Living by Chemistry
Additional Science Textbook Solutions
Living By Chemistry: First Edition Textbook
General, Organic, and Biological Chemistry (3rd Edition)
Organic Chemistry (8th Edition)
Introductory Chemistry (5th Edition) (Standalone Book)
Chemistry: A Molecular Approach
General Chemistry: Principles and Modern Applications (11th Edition)
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY