Chapter 38 Workbook Solutions
Chapter 38 Workbook Solutions
Chapter 38 Workbook Solutions
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<strong>38</strong>.5 Bohr's Model of Atomic Quantization<br />
<strong>38</strong>.6 The Bohr Hydrogen Atom<br />
<strong>38</strong>.7 The Hydrogen Spectrum<br />
Quantization . cHAPTER <strong>38</strong> <strong>38</strong>-9<br />
30. J. J. Thomson studied the ionization of atoms in collisions with electrons. He accelerated electrons<br />
through a potential difference, shot them into a gas of atoms, then used a mass spectrometer to detect<br />
any ions produced in the collisions. By using different gases, he found that he could produce singly<br />
ionized atoms of allthe elements that he tried. When he used higher accelerating voltages, he was able<br />
to produce doubly ionized atorns of all elements except hydrogen.<br />
a. Why did Thornson have to use higher accelerating voltages to detect doubly ionized atoms than to<br />
detect singly ionized atoms?<br />
To ..,o*" a sinq\y ioniznd dto,^.n, otto gleJco"' **t b" aor'.ouuJ<br />
4.o,- the 61*oua. A'do*b!1 ionizoA oto- fcq.rirqg Jhc re,v,novq.l of<br />
*vro. c\e.g*cons ylhich **kls rnoec. onergY qnd'thorttoce highar<br />
$,Cce\ege.{i r,q vo\to,qtS.<br />
b. What conclusion-or conclusions about hydrogen atoms can you draw from these observations? Be<br />
specific as to how your conclusions are related to the observations.<br />
H"lroo.or. e,r.,.st not hqv" two e-\sctrons tho.t can bc nc,vro{el<br />
to lrcjct.- o, do.^b\y ionizeA a*ov"r. ll1Aeolc^ hos o".\1 oylo<br />
g\q,*r o'n .<br />
3 1. If an electron is in a stationary state of an atom, is the electron at rest? If not, what does the term<br />
mean?<br />
No , th. e\q-ctron ,"tron is \^ot o* rc-s+. T+ is in o\n o\lot^tol orbi+'<br />
ott"*"a , or 1. *t"li.f 'or bi{s are, co"lloA stotton4rY<br />
\c. o",\*,<br />
stalcs. '<br />
32. The diagram shows the energy level diagram of element X.<br />
a. Wliat is the ionization energy of element X?<br />
lE,l = '1 uv<br />
E = o eV<br />
-leV-ll=3 i I 240 nnr<br />
-2cV - n=2<br />
g b. An atom in the ground state absorbs a photon, then emits a photon with a wavelength of 1240 nm.<br />
What conclusion can you draw about the energy of the photon that was absorbed?<br />
5<br />
r!<br />
o.<br />
O<br />
N<br />
ErU,oto'.,= 3c\<br />
@ c. An atom in the ground state has a collision with an electron, then emits a photon with a wavelength<br />
of 1240 nm. What conclusion can you draw about the initial kinetic energy of the electron?<br />
Eur."= 3 oV<br />
--4 eV
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