Question 1

The energy released when an atom takes an electron is called

Accepted Answer

A) internal energy 
B) dissociation energy 
C) binding energy 
D) electron affinity 
E) ionization energy 
A) internal energy 
B) dissociation energy 
C) binding energy 
D) electron affinity 
E) ionization energy

Question 2

The fundamental frequency of HF is 8.72 × 1013 Hz.The energy associated with a transition from the 10th to the 9th vibrational quantum number (in eV)is

Accepted Answer

A) 3.61 
B) 0.361 
C) 0.060 5 
D) 0.605 
E) 0.182 
A) 3.61 
B) 0.361 
C) 0.060 5 
D) 0.605 
E) 0.182

Question 3

The difference between donor and acceptor atoms in a doped semiconductor is that

Accepted Answer

A) the donor energy level lies halfway between the valence band and the acceptor level. 
B) the donor energy level lies near the valence band and the acceptor energy level lies near the conduction band. 
C) donor energy levels cannot exist unless acceptor energy levels are present. 
D) the donor energy level lies near the conduction band and the acceptor energy level lies near the valence band. 
E) the acceptor energy level lies halfway between the conduction band and the donor energy level. 
A) the donor energy level lies halfway between the valence band and the acceptor level. 
B) the donor energy level lies near the valence band and the acceptor energy level lies near the conduction band. 
C) donor energy levels cannot exist unless acceptor energy levels are present. 
D) the donor energy level lies near the conduction band and the acceptor energy level lies near the valence band. 
E) the acceptor energy level lies halfway between the conduction band and the donor energy level.

Question 4

Assume a diatomic molecule can be considered to be two point masses separated by a distance r.The center of mass of the system is located a distance x from m1,equal to

Accepted Answer

A) m1r/(m1 + m2) 
B) m2r/(m1 + m2) 
C) (m1 + m2)r/m1 
D) (m1 + m2)r/m2 
E) r(m2/m1) 
A) m1r/(m1 + m2) 
B) m2r/(m1 + m2) 
C) (m1 + m2)r/m1 
D) (m1 + m2)r/m2 
E) r(m2/m1)

Question 5

When a voltage ΔV is applied to a p-n junction diode at absolute temperature T,the current voltage relationship is

Accepted Answer

A)    . 
B)    . 
C)    . 
D)    . 
E)    . 
A)    . 
B)    . 
C)    . 
D)    . 
E)    .

Question 6

The Fermi energy corresponds to

Accepted Answer

A) the maximum energy electrons can have in a metal at T = 0 K. 
B) the maximum energy electrons can have in a metal at T = 0 C. 
C) the minimum energy electrons can have in a metal at T = 0 K. 
D) the number of electrons per unit volume between E and E + dE. 
E) the minimum energy electrons can have in a metal at T = 0 C. 
A) the maximum energy electrons can have in a metal at T = 0 K. 
B) the maximum energy electrons can have in a metal at T = 0 C. 
C) the minimum energy electrons can have in a metal at T = 0 K. 
D) the number of electrons per unit volume between E and E + dE. 
E) the minimum energy electrons can have in a metal at T = 0 C.

Exam 43: Molecules and Solids

The energy released when an atom takes an electron is called

The fundamental frequency of HF is 8.72 × 1013 Hz.The energy associated with a transition from the 10th to the 9th vibrational quantum number (in eV)is

The difference between donor and acceptor atoms in a doped semiconductor is that

Assume a diatomic molecule can be considered to be two point masses separated by a distance r.The center of mass of the system is located a distance x from m1,equal to

When a voltage ΔV is applied to a p-n junction diode at absolute temperature T,the current voltage relationship is

The Fermi energy corresponds to

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The fundamental frequency of HF is 8.72 × 10¹³ Hz.The energy associated with a transition from the 10th to the 9th vibrational quantum number (in eV)is

Assume a diatomic molecule can be considered to be two point masses separated by a distance r.The center of mass of the system is located a distance x from m₁,equal to