Question 1

The radiation from stars that is in the form of spectral lines comes primarily from the

Accepted Answer

A)  surface of the stars. 
B)  interior of the stars. 
C)  Both of the first two responses are valid. 
D)  Neither of the first two responses is valid. 
A)  surface of the stars. 
B)  interior of the stars. 
C)  Both of the first two responses are valid. 
D)  Neither of the first two responses is valid.

Question 2

The light emitted from a collection of identical atoms produces not a continuous spectrum, but rather discrete wavelengths called

Accepted Answer

A)  spectral lines. 
B)  a blackbody spectrum. 
C)  gamma rays. 
D)  whitebody rays. 
A)  spectral lines. 
B)  a blackbody spectrum. 
C)  gamma rays. 
D)  whitebody rays.

Question 3

For the hydrogen atom, the radii of the first two excited states (in terms of the Bohr radius) are

Accepted Answer

A)  1/4, 1/9. 
B)  1/2, 1/3. 
C)  2, 3. 
D)  4, 9. 
A)  1/4, 1/9. 
B)  1/2, 1/3. 
C)  2, 3. 
D)  4, 9.

Question 4

The principal reason behind the correct response to the previous question is that

Accepted Answer

A)  the charge of the helium nucleus is double that of the hydrogen nucleus. 
B)  the mass of the helium nucleus is four times that of the hydrogen nucleus. 
C)  Both of the first two responses are needed to account for the correct answer to the previous question. 
D)  Neither of the first two responses is needed to account for the correct answer to the previous question. 
A)  the charge of the helium nucleus is double that of the hydrogen nucleus. 
B)  the mass of the helium nucleus is four times that of the hydrogen nucleus. 
C)  Both of the first two responses are needed to account for the correct answer to the previous question. 
D)  Neither of the first two responses is needed to account for the correct answer to the previous question.

Question 5

The similarities of chemicals having similar electron configurations include each of the following except

Accepted Answer

A)  chemical activity. 
B)  atomic spectra. 
C)  atomic size. 
D)  Hold it! There are no exceptions. 
A)  chemical activity. 
B)  atomic spectra. 
C)  atomic size. 
D)  Hold it! There are no exceptions.

Question 6

Bohr's theory of the atom resulted in the quantization of all of the following physical parameters of the electron except

Accepted Answer

A)  energy. 
B)  angular momentum. 
C)  radius. 
D)  Hold it! There are no exceptions. 
A)  energy. 
B)  angular momentum. 
C)  radius. 
D)  Hold it! There are no exceptions.

Question 7

Each of the following particles obeys the Pauli Exclusion Principle except

Accepted Answer

A)  electron. 
B)  neutron. 
C)  photon. 
D)  proton. 
A)  electron. 
B)  neutron. 
C)  photon. 
D)  proton.

Question 8

The general form of the frequencies of the spectral series for hydrogen is

Accepted Answer

A)  $v \infty \left\{ \left( \frac { 1 } { n _ { 2 } } - \frac { 1 } { n _ { 1 } } \right) \right\}$ 
B)  $\mathcal{v}$ $\infty\left\{\left(\frac{1}{n_{2}}\right)^{2}-\left(\frac{1}{n_{1}}\right)^{2}\right\}$. 
C)  $\mathcal{v}$ $\infty\left\{\left(\frac{1}{n_{2}}\right)^{2}-\left(\frac{1}{n_{1}}\right)^{2}\right\}$ 
D)  $\mathcal{v}$  $\infty \left\{ \left( n _ { 2 } \right) ^ { 2 } - \left( n _ { 1 } \right) ^ { 2 } \right\}$ 
A)  $v \infty \left\{ \left( \frac { 1 } { n _ { 2 } } - \frac { 1 } { n _ { 1 } } \right) \right\}$ 
B)  $\mathcal{v}$ $\infty\left\{\left(\frac{1}{n_{2}}\right)^{2}-\left(\frac{1}{n_{1}}\right)^{2}\right\}$. 
C)  $\mathcal{v}$ $\infty\left\{\left(\frac{1}{n_{2}}\right)^{2}-\left(\frac{1}{n_{1}}\right)^{2}\right\}$ 
D)  $\mathcal{v}$  $\infty \left\{ \left( n _ { 2 } \right) ^ { 2 } - \left( n _ { 1 } \right) ^ { 2 } \right\}$

Question 9

The Heisenberg uncertainty relations apply to

Accepted Answer

A)  photons. 
B)  electrons. 
C)  atoms. 
D)  all of the above. 
A)  photons. 
B)  electrons. 
C)  atoms. 
D)  all of the above.

Question 10

An electron in the Bohr model is in an $n = 1$ state. Its angular momentum is

Accepted Answer

A)  $2.11 \times 10 ^ { - 34 }$ J.s. 
B)  $1.06 \times 10 ^ { - 34 }$ J.s. 
C)  $3.17 \times 10 ^ { - 34 }$ J.s. 
D)  $4.17 \times 10 ^ { - 34 }$ J.s. 
A)  $2.11 \times 10 ^ { - 34 }$ J.s. 
B)  $1.06 \times 10 ^ { - 34 }$ J.s. 
C)  $3.17 \times 10 ^ { - 34 }$ J.s. 
D)  $4.17 \times 10 ^ { - 34 }$ J.s.

Question 11

The forbidden energies of free electrons in a conductor are a consequence of their de Broglie wavelengths, which result in all of the following except

Accepted Answer

A)  the production of standing waves. 
B)  a partial reflection from lattice sites. 
C)  a partial transmission through lattice sites. 
D)  Hold it! There are no exceptions. 
A)  the production of standing waves. 
B)  a partial reflection from lattice sites. 
C)  a partial transmission through lattice sites. 
D)  Hold it! There are no exceptions.

Exam 38: Spectral Lines, Bohrs Theory, and Quantum Mechanics

The radiation from stars that is in the form of spectral lines comes primarily from the

The light emitted from a collection of identical atoms produces not a continuous spectrum, but rather discrete wavelengths called

For the hydrogen atom, the radii of the first two excited states (in terms of the Bohr radius) are

The principal reason behind the correct response to the previous question is that

The similarities of chemicals having similar electron configurations include each of the following except

Bohr's theory of the atom resulted in the quantization of all of the following physical parameters of the electron except

Each of the following particles obeys the Pauli Exclusion Principle except

The general form of the frequencies of the spectral series for hydrogen is

The Heisenberg uncertainty relations apply to

An electron in the Bohr model is in an n=1n = 1n=1 state. Its angular momentum is

The forbidden energies of free electrons in a conductor are a consequence of their de Broglie wavelengths, which result in all of the following except

Space, Time, and Mass

Motion Along a Straight Line

Vectors

Motion in Two and Three Dimensions

Newtons Laws of Motion

Further Applications of Newtons Laws

Work and Energy

Conservation of Energy

Gravitation

Systems of Particles

Collisions

Rotation of a Rigid Body

Dynamics of a Rigid Body

Statics and Elasticity

Oscillations

Waves

Sound

Fluid Mechanics

The Ideal Gas

Heat

Thermodynamics

Electric Force and the Electric Charge

The Electric Field

Gauss Law

Electrostatic Potential and Energy

Capacitors and Dielectrics

Currents and Ohms Law

Direct Current Circuits

Magnetic Force and Field

Charges and Currents in Magnetic Fields

Electromagnetic Induction

Alternating Current Circuits

Electromagnetic Waves

Reflection, Refraction, and Optics

Interference and Diffraction

The Theory of Special Relativity

Quanta of Light

Quantum Structure of Atoms, Molecules, and Solids

Nuclei

Elementary Particles and Cosmology

Filters

An electron in the Bohr model is in an $n = 1$ state. Its angular momentum is