COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 26, Problem 69QAP
To determine
To prove:
The Balmer formula
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•19 O Figure 39-28a shows the energy-level diagram for a fi-
nite, one-dimensional energy well that contains an electron. The
nonquantized region begins at E= 450.0 eV. Figure 39-28b gives
the absorption spectrum of the electron when it is in the ground
state-it can absorb at the indicated wavelengths: A=14.588 nm
and Ag = 4.8437 nm and for any wavelength less than A, = 2.9108
nm. What is the energy of the first excited state?
%3D
- Nonquantized
E4
Es
E2
(b)
(a)
Energy
• Which of the following postulates of the Bohr model led to the quantization of energy of the hydrogen
atom?
A- The electron goes around the nucleus in circular orbits.
B- The angular momentum of the electron can only be an integral multiple of h/2a.
C- The magnitude of the linear momentum of the electron is quantized.
D- Quantization of energy is itself a postulate of the Bohr model.A. Electrons,
• The Bohr model of atoms
A- assumes that the angular momentum of electrons is quantized.
B- uses Einstein's photoelectric equation.
C- predicts continuous emission spectra for atoms.
D- predicts the same emission spectra for all types of atoms.
• The diagram shows the energy levels for an electron in a certain atom. Which transition shown
represents the emission of a photon with the most energy?
R= 2
=1-
%3D
IV
A-I
A-I
В-П
C- III
D- IV
• The Bohr model of an atom
A- assumes that the angular momentum of electrons is quantised.
B- uses Einstein's photoelectric equation.
C- predicts continuous…
•22 o Figure 40-23 is an energy-level
diagram for a fictitious infinite potential
E (/8ml*)
well that contains one electron. The num-
12
Non
ber of degenerate states of the levels are
indicated: "non" means nondegenerate
11
Triple
(which includes the ground state of the
electron), "double" means 2 states, and
"triple" means 3 states. We put a total of
Double
Triple
11 electrons in the well. If the electro-
Ground
static forces between the electrons can be
neglected, what multiple of h2/8mL? gives
the energy of the first excited state of the
11-electron system?
Figure 40-23
Problem 22.
Chapter 26 Solutions
COLLEGE PHYSICS
Ch. 26 - Prob. 1QAPCh. 26 - Prob. 2QAPCh. 26 - Prob. 3QAPCh. 26 - Prob. 4QAPCh. 26 - Prob. 5QAPCh. 26 - Prob. 6QAPCh. 26 - Prob. 7QAPCh. 26 - Prob. 8QAPCh. 26 - Prob. 9QAPCh. 26 - Prob. 10QAP
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- The Csl crystal structure is BCC. The equilibrium spacing is approximately r0=0.46nm . If Cs+ ion a occupies a cubic volume of r03, what is the distance of this ion to its "nearest neighbor” I+ ion?arrow_forward6 A diatomic gas molecule consists of two atoms of mass m separated by a fixed distance d rotating about an axis as indicated in Fig. 39-25. Assuming that its angular momentum is quan- tized as in the Bohr model for the hydrogen atom, find (a) the possible angular velocities and (b) the possible quantized rotational energies. m d/2- Axis -d/2- m Figure 39-25 Problem 6.arrow_forwardPROBLEM 3 The following process: Cl2(g) → 2CI(g) requires 239 kJ/mol. What is the maximum wavelength of light (in nm) that can be uSed to cause dissociation of C2 molecules into chlorine atoms? Identify the spectral region of this light. hm 700 600 500 400 Visible spectrum 2 (m) 10 10 10 102 10 102 10 106 10 10-10 10 12 10-14 1015 Electricity Radio wayes Long radio waves Infra red (IR UV X-rays -rays Cosmic-rays AM EM v (Hz) 10° 102 10 10 10 10 1012 1014 1015 108 1020 1022 1024 Increasing wavelength Increasing energyarrow_forward
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- • Which of the following is always used in the forward biased arrangement? A. Zener diode, B. LED, C. Photodiode, D. Varactor diode. • The color of light emitted by a LED depends upon: A. its reverse bias, B. its forward bias, C. the amount of forward current, D. the type of semiconductor material used. In LED, blue light is emitted by: A. GaAs, B. GaP, C. GaAsP, D. GaN.arrow_forward2 R --- n multiple choice question In the equation below, the Balmer series involves the emission lines (wavelengths) obtained when electrons go from any higher energy (excited) level to A The ground level (n = 1) B. The first atomic level (n = 2) C. The third atomic level (n = 3) D. The fourth atomic level (n = 4) Jump to E. The fifth atomic level (n = 4) 2 where, R = 1.097 x 107 m1 3 5arrow_forwardJC-41) Angular Momentum in the Hydrogen Atom An electron is in an angular momentum state with e 3. a) What is the length of the electron's angular momentum vector? b) How many different possible z components can the angular momentum vector have? c) What are the values of the angle that the L vector makes with the z-axis? Make a table of your answers. Express your answer in degrees.arrow_forward
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