Chemical Principles
8th Edition
ISBN: 9781305581982
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Textbook Question
Chapter 2, Problem 31E
Consider Ernest Rutherford’s a-particle bombardmentexperiment illustrated in Fig. 2.11. How did the results ofthis experiment lead Rutherford away from the plumpudding model of the atom to propose the nuclear modelof the atom?
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Chemical Principles
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- Which of the following are isotopes of element X, the atomic number for which is 9: 919X, 920X, 189X, and 921X?arrow_forwardHow can we account for the fact that most of the alpha particles in the Rutherford scattering experiment passed directly through a solid sheet of gold?arrow_forwardWhat advantage does the atomic mass unit have over grams when speaking of the mass of an atom or a subatomic particle?arrow_forward
- hat questions were left unanswered by Rutherford’s experiments?arrow_forwardHow can we account for the fact that, in the Rutherford scattering experiment, some of the alpha particles were deflected from their paths through the gold foil, and some were even deflected back at various angles?arrow_forwardThe last “missing” element from the first six periods was promethium, which was finally discovered in 1947 among the fission products of uranium. Determine (a) the ratio of the number of neutrons in a 145Pm nucleus to the number of protons, and (b) the number of electrons in a single promethium atom.arrow_forward
- The Rutherford experiment was performed and its conclusions reached before protons and neutrons were discovered. When they were found, why was it believed that they were in the nucleus of the atom?arrow_forwardIt is good practice to actively read the textbook and to try to verify claims that are made when you can. The following claim is made in your textbook: “. . . if the nucleus were the size of a grape, the electrons would be about 1 mile away on average.” Provide mathematical support for this statement.arrow_forwardConsider Ernest Rutherfords -particle bombardment experiment illustrated in Fig. 2.12. How did the results of this experiment lead Rutherford away from the plum pudding model of the atom to propose the nuclear model of the atom?arrow_forward
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