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____ 128. Refer to Ch. 5 Values. The energy of a photon of light is 1.5 10 -20 J. What is its wavelength?<br />
a. 4.67 10 4 Å<br />
b. 1.33 10 5 Å<br />
c. 5.12 10 4 Å<br />
d. 6.25 10 5 Å<br />
e. 7.60 10 3 Å<br />
____ 129. Refer to Ch. 5 Values. The emission spectrum of mercury shows a line of wavelength 579 nm. How much<br />
energy is emitted as the excited electron falls to a lower energy level?<br />
a. 3.43 10 -19 J/atom<br />
b. 1.07 10 -20 J/atom<br />
c. 6.05 10 -19 J/atom<br />
d. 3.60 10 -20 J/atom<br />
e. 5.16 10 -20 J/atom<br />
____ 130. What is the de Broglie wavelength of a 16.0 lb shotput moving at a velocity of 7.26 m/s?<br />
a. 1.30 10 -38 m<br />
b. 1.85 10 -30 m<br />
c. 1.26 10 -35 m<br />
d. 2.60 10 -36 m<br />
e. 6.63 10 -31 m<br />
____ 131. Which response includes all the following statements that are true, and no others?<br />
I. When an electron falls to a lower energy level in an atom, it emits electromagnetic<br />
radiation.<br />
II. The energy of electromagnetic radiation is directly proportional to its frequency.<br />
III. The product of wavelength and the speed of light is frequency.<br />
IV. Atoms can exist only in certain energy states.<br />
a. I<br />
b. I and III<br />
c. II<br />
d. II and III<br />
e. I, II, and IV<br />
____ 132. Which response lists all the true statements about the four quantum numbers?<br />
I. n = principal quantum number, n = 1,2,3, . . .<br />
II. l = angular momentum quantum number, l = 0,1,2,3, . . ., (n-1)<br />
III. m l = magnetic quantum number, m l = 0, 1, . . ., l<br />
IV. m s = spin quantum number, m s =<br />
a. I, II, and IV<br />
b. I, II, and III<br />
c. I and III<br />
d. II and III<br />
e. II, III, and IV<br />
____ 133. The orientation in space of an orbital is designated by which quantum number?
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