World of Chemistry, 3rd edition
3rd Edition
ISBN:9781133109655
Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Chapter3: Chemical Foundations: Elements, Atoms, And Ions
Section: Chapter Questions
Problem 17A
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Question
Only question highlighting
Transcribed Image Text:have the smallest envirónmentål impact?
A valu
Mass (g) of
Sample
Mass (g) of
Sulfur in Sample
2.42
ber of
(a) ¡E
Coal A
378
11.3
495
19.0
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Coal B
Coal C
675
20.6
A va
Dalton's Atomic Theory
(Sample Problem 2.3)
2.43
Concept Review Questions
(a)
2.30 Which of Dalton's postulates about atoms are inconsistent
with later observations? Do these inconsistencies mean that
Dalton was wrong? Is Dalton's model still useful? Explain.
2.31 Use Dalton's theory to explain why potassium nitrate from
India or Italy has the same mass percents of K, N, and O.
The Observations That Led to the Nuclear Atom Model
Concept Review Questions
2.32 Thomson was able to determine the mass/charge ratio of the
electron but not its mass. How did Millikan's experiment allow
determination of the electron's mass?
2.33 The following charges on individual oil droplets were obtained
during an experiment similar to Millikan's: -3.204x10-19 C;
-4.806x10-19 C; -8.010×10¬19 C; -1.442x1018 C. Determine a
charge for the electron (in C, coulombs), and explain your
anşwer.
2.34 Describe Thomson's model of the atom. How might it ac-
count for the production of cathode rays?
2.35 When Rutherford's coworkers bombarded gold foil with
a particles, they obtained results that overturned the existing
(Thomson) model of the atom. Explain.
The Atomic Theory Today
(Sample Problems 2.4 and 2.5)
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