Question 1

You will never find an electron in state

Accepted Answer

A)  3S 
B)  3P 
C)  3D 
D)  3F 
E)  9S 
A)  3S 
B)  3P 
C)  3D 
D)  3F 
E)  9S

Question 2

Evidence of electron capture by a nucleus would be the emission of

Accepted Answer

A)  electrons from the K-shell. 
B)  protons. 
C)  neutrons. 
D)  alpha rays. 
E)  X rays. 
A)  electrons from the K-shell. 
B)  protons. 
C)  neutrons. 
D)  alpha rays. 
E)  X rays.

Question 3

Which of the following atomic numbers (which are the same as the number of electrons in a neutral atom) correspond to an electronic ground-state configuration which ends in "..p3"?

Accepted Answer

A)  7, 15, 33 
B)  7, 15, 35 
C)  7, 17, 35 
D)  5, 15, 31 
E)  5, 13, 31 
A)  7, 15, 33 
B)  7, 15, 35 
C)  7, 17, 35 
D)  5, 15, 31 
E)  5, 13, 31

Question 4

The electron configuration of neon (Z = 10) is

Accepted Answer

A)  1s22s62p2  
B)  1s42s32p1  
C)  1s22s32p3  
D)  1s22s22p6  
E)  1s32s22p3  
A)  1s22s62p2  
B)  1s42s32p1  
C)  1s22s32p3  
D)  1s22s22p6  
E)  1s32s22p3

Question 5

The group of symbols that could represent the set of quantum numbers for a particular electron is

Accepted Answer

A)  h, $\lambda$, c, $\nu$ 
B)  n, m, l, ms  
C)  S, P, D, F 
D)  $\Psi$, $\rho$, $\phi$ , $\Psi$* 
E)  $\nu$, p, n, $\beta$ 
A)  h, $\lambda$, c, $\nu$ 
B)  n, m, l, ms  
C)  S, P, D, F 
D)  $\Psi$, $\rho$, $\phi$ , $\Psi$* 
E)  $\nu$, p, n, $\beta$

Question 6

Bohr's quantum condition on electron orbits required

Accepted Answer

A)  that the angular momentum of the electron about the hydrogen nucleus equal nh/(2 $\pi$). 
B)  that no more than one electron occupy a given stationary state. 
C)  the electrons to spiral into the nucleus while radiating electromagnetic waves. 
D)  that the energies of an electron in a hydrogen atom be equal to nEo, where Eo is a constant energy and n is an integer. 
E)  None of these is correct. 
A)  that the angular momentum of the electron about the hydrogen nucleus equal nh/(2 $\pi$). 
B)  that no more than one electron occupy a given stationary state. 
C)  the electrons to spiral into the nucleus while radiating electromagnetic waves. 
D)  that the energies of an electron in a hydrogen atom be equal to nEo, where Eo is a constant energy and n is an integer. 
E)  None of these is correct.

Question 7

The hydrogen-like elements (valence +1) exhibit a splitting of the energy states without an external magnetic field; this is due to

Accepted Answer

A)  the interaction of the spin and orbital angular momenta. 
B)  the penetration of the electron into the inert core of filled subshells. 
C)  the fact that in a downward transition the orbital angular momentum must change by one. 
D)  the requirement that no two electrons can be in the same state at the same time. 
E)  None of these is correct. 
A)  the interaction of the spin and orbital angular momenta. 
B)  the penetration of the electron into the inert core of filled subshells. 
C)  the fact that in a downward transition the orbital angular momentum must change by one. 
D)  the requirement that no two electrons can be in the same state at the same time. 
E)  None of these is correct.

Question 8

For the hydrogen atom in the state n = 2, l = 0, m = 0, the radial probability density is   The probability of finding the electron in the range $\Delta$r = 0.04a0 at r = 1.5a0 is

Accepted Answer

A)  0.00377 
B)  0.00249 
C)  0.00428 
D)  0.0271 
E)  zero 
A)  0.00377 
B)  0.00249 
C)  0.00428 
D)  0.0271 
E)  zero

Question 9

The number of electrons in the L shell for the element whose electronic configuration is
1s22s22p63s23p2
Must be

Accepted Answer

A)  2 
B)  4 
C)  6 
D)  8 
E)  10 
A)  2 
B)  4 
C)  6 
D)  8 
E)  10

Question 10

The total angular momentum of a hydrogen atom in a given excited state has the quantum number j = 5/2. The orbital angular-momentum quantum number   must have the values

Accepted Answer

A)  0 or 1 
B)  1 or 2 
C)  2 or 3 
D)  3 or 4 
E)  5 or 6 
A)  0 or 1 
B)  1 or 2 
C)  2 or 3 
D)  3 or 4 
E)  5 or 6

Question 11

The electron in a hydrogen atom has an orbital radius of 0.0500 nm. To avoid being pulled into the nucleus by electrostatic attraction, the electron must have an orbital speed of

Accepted Answer

A)  7.12 km/s 
B)  25.2 km/s 
C)  1.02 *106 m/s 
D)  2.25 *106 m/s 
E)  5.0 *108 m/s 
A)  7.12 km/s 
B)  25.2 km/s 
C)  1.02 *106 m/s 
D)  2.25 *106 m/s 
E)  5.0 *108 m/s

Question 12

When the voltage across an X-ray tube is doubled, the wavelengths of the characteristic lines emitted by the tube

Accepted Answer

A)  double. 
B)  quadruple. 
C)  decrease to one-half of their original energy. 
D)  remain constant. 
E)  None of these is correct. 
A)  double. 
B)  quadruple. 
C)  decrease to one-half of their original energy. 
D)  remain constant. 
E)  None of these is correct.

Question 13

Which of the following transitions are allowed in the H atom?
(i) 5S to 4P, (ii) 4D to 3D, (iii) 4D to 3S, (iv) 4P to 3S, (v) 1S to 2P

Accepted Answer

A)  i, ii, v 
B)  i, iv 
C)  i, iv, v 
D)  iv, v 
E)  all are allowed 
A)  i, ii, v 
B)  i, iv 
C)  i, iv, v 
D)  iv, v 
E)  all are allowed

Question 14

Use the following figure for the next two problems.  
-Which of the following transitions from (a) to (e) is(are) not allowed?

Accepted Answer

A)  (a) and (b) 
B)  (d) and (e) 
C)  (c) and (e) 
D)  (c) 
E)  (d) 
A)  (a) and (b) 
B)  (d) and (e) 
C)  (c) and (e) 
D)  (c) 
E)  (d)

Question 15

The wavelength of the K $\alpha$ X-ray line for an element is 0.0794 nm. The atomic number of the element is

Accepted Answer

A)  36 
B)  38 
C)  40 
D)  42 
E)  44 
A)  36 
B)  38 
C)  40 
D)  42 
E)  44

Question 16

The figure shows electron 6 of the hydrogen atom in the 1S state. What number electron is in the three-dimensional state?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 17

Which of the following atomic numbers (which are the same as the number of electrons in a neutral atom) correspond to a Group 2 metal, i.e. their ground-state electronic configuration ends in "..s2"?

Accepted Answer

A)  4, 14, 20 
B)  4, 22, 40 
C)  6, 12, 22 
D)  4, 12, 38 
E)  4, 14, 38 
A)  4, 14, 20 
B)  4, 22, 40 
C)  6, 12, 22 
D)  4, 12, 38 
E)  4, 14, 38

Question 18

An electron undergoes a transition from n = 2 to n = 5. According to Bohr's model, the change in angular momentum of the electron is

Accepted Answer

A)    
B)    
C)    
D)    
E)  None of these is correct. 
A)    
B)    
C)    
D)    
E)  None of these is correct.

Question 19

What is the difference in wavelength between the longest wavelength in the Lyman series and that of the longest wavelength in the Paschen series?

Accepted Answer

A)  1754 nm 
B)  1876 nm 
C)  535 nm 
D)  1220 nm 
E)  None of these is correct. 
A)  1754 nm 
B)  1876 nm 
C)  535 nm 
D)  1220 nm 
E)  None of these is correct.

Question 20

What is the ratio of the radius of the n = 3 orbit to that of the n = 2 orbit?

Accepted Answer

A)  1.50 
B)  4.50 
C)  2.25 
D)  0.666 
E)  None of these is correct. 
A)  1.50 
B)  4.50 
C)  2.25 
D)  0.666 
E)  None of these is correct.

You will never find an electron in state

Evidence of electron capture by a nucleus would be the emission of

Which of the following atomic numbers (which are the same as the number of electrons in a neutral atom) correspond to an electronic ground-state configuration which ends in "..p³"?

The electron configuration of neon (Z = 10) is

The group of symbols that could represent the set of quantum numbers for a particular electron is

Bohr's quantum condition on electron orbits required

The hydrogen-like elements (valence +1) exhibit a splitting of the energy states without an external magnetic field; this is due to

The number of electrons in the L shell for the element whose electronic configuration is 1s²2s²2p⁶3s²3p² Must be

The total angular momentum of a hydrogen atom in a given excited state has the quantum number j = 5/2. The orbital angular-momentum quantum number must have the values

The electron in a hydrogen atom has an orbital radius of 0.0500 nm. To avoid being pulled into the nucleus by electrostatic attraction, the electron must have an orbital speed of

When the voltage across an X-ray tube is doubled, the wavelengths of the characteristic lines emitted by the tube

Which of the following transitions are allowed in the H atom? (i) 5S to 4P, (ii) 4D to 3D, (iii) 4D to 3S, (iv) 4P to 3S, (v) 1S to 2P

Use the following figure for the next two problems. -Which of the following transitions from (a) to (e) is(are) not allowed?

The wavelength of the K _$\alpha$ X-ray line for an element is 0.0794 nm. The atomic number of the element is

The figure shows electron 6 of the hydrogen atom in the 1S state. What number electron is in the three-dimensional state?

Which of the following atomic numbers (which are the same as the number of electrons in a neutral atom) correspond to a Group 2 metal, i.e. their ground-state electronic configuration ends in "..s^2"?

An electron undergoes a transition from n = 2 to n = 5. According to Bohr's model, the change in angular momentum of the electron is

What is the difference in wavelength between the longest wavelength in the Lyman series and that of the longest wavelength in the Paschen series?

What is the ratio of the radius of the n = 3 orbit to that of the n = 2 orbit?

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

Exam 16: Atoms

You will never find an electron in state

Evidence of electron capture by a nucleus would be the emission of

Which of the following atomic numbers (which are the same as the number of electrons in a neutral atom) correspond to an electronic ground-state configuration which ends in "..p3"?

The electron configuration of neon (Z = 10) is

The group of symbols that could represent the set of quantum numbers for a particular electron is

Bohr's quantum condition on electron orbits required

The hydrogen-like elements (valence +1) exhibit a splitting of the energy states without an external magnetic field; this is due to

For the hydrogen atom in the state n = 2, l = 0, m = 0, the radial probability density is The probability of finding the electron in the range Δ\DeltaΔ r = 0.04a0 at r = 1.5a0 is

The number of electrons in the L shell for the element whose electronic configuration is 1s22s22p63s23p2 Must be

The total angular momentum of a hydrogen atom in a given excited state has the quantum number j = 5/2. The orbital angular-momentum quantum number must have the values

The electron in a hydrogen atom has an orbital radius of 0.0500 nm. To avoid being pulled into the nucleus by electrostatic attraction, the electron must have an orbital speed of

When the voltage across an X-ray tube is doubled, the wavelengths of the characteristic lines emitted by the tube

Which of the following transitions are allowed in the H atom? (i) 5S to 4P, (ii) 4D to 3D, (iii) 4D to 3S, (iv) 4P to 3S, (v) 1S to 2P

Use the following figure for the next two problems. -Which of the following transitions from (a) to (e) is(are) not allowed?

The wavelength of the K α\alphaα X-ray line for an element is 0.0794 nm. The atomic number of the element is

The figure shows electron 6 of the hydrogen atom in the 1S state. What number electron is in the three-dimensional state?

Which of the following atomic numbers (which are the same as the number of electrons in a neutral atom) correspond to a Group 2 metal, i.e. their ground-state electronic configuration ends in "..s2"?

An electron undergoes a transition from n = 2 to n = 5. According to Bohr's model, the change in angular momentum of the electron is

What is the difference in wavelength between the longest wavelength in the Lyman series and that of the longest wavelength in the Paschen series?

What is the ratio of the radius of the n = 3 orbit to that of the n = 2 orbit?

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

Which of the following atomic numbers (which are the same as the number of electrons in a neutral atom) correspond to an electronic ground-state configuration which ends in "..p³"?

The number of electrons in the L shell for the element whose electronic configuration is 1s²2s²2p⁶3s²3p² Must be

The wavelength of the K _$\alpha$ X-ray line for an element is 0.0794 nm. The atomic number of the element is

Which of the following atomic numbers (which are the same as the number of electrons in a neutral atom) correspond to a Group 2 metal, i.e. their ground-state electronic configuration ends in "..s^2"?