Question 1

Cesium atomic clocks are based on the emission of microwave radiation at 9,192,631,770 Hz by cesium-133.The wavelength corresponding to this frequency is closest in value to which of the following?

Accepted Answer

A) 300 m 
B) 3 km 
C) 300 pm 
D) 3 cm 
E) 300 mm

Question 2

The size of a typical atomic orbital is on the order of __________

Accepted Answer

A) femtometers. 
B) picometers. 
C) nanometers. 
D) micrometers. 
E) millimeters.

Question 3

In which orbital would an electron feel the highest effective nuclear charge?

Accepted Answer

A) 3s 
B) 4s 
C) 3p 
D) 4p 
E) 3d

Question 4

What is the energy (E,in J)of a 6.00 $\times$ 1010 Hz photon from a microwave oven?

Accepted Answer

A) 3.98 $\times$ 10-30 J 
B) 3.98 $\times$ 10-39 J 
C) 3.98 $\times$ 10-23 J 
D) 3.98 $\times$ 10-17 J 
E) 3.98 $\times$ 10-13 J

Question 5

Which of the following atoms or ions has a single unpaired electron?

Accepted Answer

A) He 
B) Sr 
C) Al 
D) Na+ 
E) Be

Question 6

Calculate the de Broglie wavelength of an electron (9.11 $\times$ 10-31 kg)when the distance it travels in one second is equal to its wavelength.

Accepted Answer

A) 22.9 mm 
B) 37.0 m 
C) 1.38 km 
D) 2.70 cm 
E) 0.727 mm

Question 7

Suppose a blue light emitting photons with λ = 470 nm is rated at 60W (60 J of energy are emitted per second).How many photons are emitted in 5.0 seconds?

Accepted Answer

A) 4.2 $\times$ 1019 photons 
B) 7.1 $\times$ 1020 photons 
C) 1.4 $\times$ 1020 photons 
D) 2.1 $\times$ 1038 photons 
E) 1.6 $\times$ 109 photons

Question 8

Which statement regarding atomic emission spectra and the hydrogen atom is incorrect?

Accepted Answer

A) Electronic transitions in the atom are quantized. 
B) Discrete wavelengths of light can be absorbed or emitted by atoms. 
C) Atoms can absorb all wavelengths of light but only emit photons of discrete energies. 
D) Balmer proved that the hydrogen atom had a wavelike nature. 
E) Balmer and Rydberg developed empirical equations to fit experimental data.

Question 9

What are the principal and angular momentum quantum numbers for a 4f orbital?

Accepted Answer

A) n = 4,  = 2 
B) n = 3,  = 4 
C) n = 4,  = 3 
D) n = 4,  = 4 
E) n = 4,  = 1

Question 10

Electron affinity is the energy change that occurs ________________

Accepted Answer

A) when one mole of electrons are added to one mole of gas-phase atoms or ions. 
B) when a gas-phase atom or ion in its ground state gains an electron. 
C) when one mole of electrons is added to one mole of atoms in their most stable state. 
D) when an electron experiences the pull of the nucleus. 
E) when an atom attracts an electron on another atom to form a chemical bond.

Question 11

Which of the following statements regarding degenerate orbitals is correct?

Accepted Answer

A) Orbitals sharing the same principal and angular momentum quantum numbers are degenerate. 
B) Orbitals sharing the same magnetic quantum number are degenerate. 
C) Electrons with the same value of n are equal in energy in all atoms. 
D) Orbitals sharing the same  value are degenerate. 
E) As the effective nuclear charge increases,all orbitals in a shell become equal in energy.

Question 12

Which of the following sets of quantum numbers is NOT allowed?

Accepted Answer

A) n = 1,  = 1,m  = 0,ms = -  
B) n = 3,  = 0,m  = 0,ms = +  
C) n = 3,  = 1,m  = -1,ms = -  
D) n = 5,  = 4,m  = 0,ms = +  
E) n = 6,  = 3,m  = 2,ms = -

Question 13

The Fraunhofer lines are evidence that __________

Accepted Answer

A) atoms contain nuclei. 
B) atoms contain charged particles. 
C) mass is equivalent to energy. 
D) atoms absorb light. 
E) atoms emit light.

Question 14

A hydrogen atom is excited to ninitial = 8.A 955 nm photon is emitted as the electron falls to nfinal = __________.

Accepted Answer

A) 6 
B) 5 
C) 4 
D) 3 
E) 2

Question 15

You synthesize an atom that appears to fit under francium in the periodic table.Which of the following would you predict is the correct condensed electron configuration for this atom?

Accepted Answer

A) [Fr]8s1 
B) [Rn]8s1 
C) [Uuo]8s1 
D) [Ra]9s2 
E) There is no way to predict this.

Question 16

What is the de Broglie wavelength of a fast neutron (1.6749 $\times$ 10-27 kg)traveling at 14,000 km/s?

Accepted Answer

A) 53 fm 
B) 5.3 pm 
C) 28 pm 
D) 28 fm 
E) 25 m/s

Question 17

What is the longest wavelength of light emitted by an excited hydrogen atom when nfinal = 1?

Accepted Answer

A) 91.16 nm 
B) 121.5 nm 
C) 273.5 nm 
D) 364.6 nm 
E) 656.2 nm

Question 18

The atomic radius of germanium (Z = 32)is smaller than the atomic radius of potassium (Z = 19)because of __________

Accepted Answer

A) a change in the n quantum number. 
B) an increase in the effective nuclear charge. 
C) the fact that p and d orbitals have the same orbital penetration. 
D) a decrease in the effective nuclear charge. 
E) germanium having 32 rather than 19 electrons.

Question 19

Arrange the following elements in order of increasing electron affinity: Li,O,Ne,P.

Accepted Answer

The answer of Arrange the following elements in order of...

Question 20

Write the condensed electron configuration of S.How many core and how many valence electrons does a sulfur atom contain?

Accepted Answer

The answer of Write the condensed electron configuration of S.How...

Exam 3: Atomic Structure-Explaining the Properties of Elements

Cesium atomic clocks are based on the emission of microwave radiation at 9,192,631,770 Hz by cesium-133.The wavelength corresponding to this frequency is closest in value to which of the following?

The size of a typical atomic orbital is on the order of __________

In which orbital would an electron feel the highest effective nuclear charge?

What is the energy (E,in J) of a 6.00 $\times$ 10¹⁰ Hz photon from a microwave oven?

Which of the following atoms or ions has a single unpaired electron?

Calculate the de Broglie wavelength of an electron (9.11 $\times$ 10^-31kg) when the distance it travels in one second is equal to its wavelength.

Suppose a blue light emitting photons with λ = 470 nm is rated at 60W (60 J of energy are emitted per second) .How many photons are emitted in 5.0 seconds?

Which statement regarding atomic emission spectra and the hydrogen atom is incorrect?

What are the principal and angular momentum quantum numbers for a 4f orbital?

Electron affinity is the energy change that occurs ________________

Which of the following statements regarding degenerate orbitals is correct?

Which of the following sets of quantum numbers is NOT allowed?

The Fraunhofer lines are evidence that __________

A hydrogen atom is excited to n_initial = 8.A 955 nm photon is emitted as the electron falls to n_final = __________.

You synthesize an atom that appears to fit under francium in the periodic table.Which of the following would you predict is the correct condensed electron configuration for this atom?

What is the de Broglie wavelength of a fast neutron (1.6749 $\times$ 10^-27 kg) traveling at 14,000 km/s?

What is the longest wavelength of light emitted by an excited hydrogen atom when n_final = 1?

The atomic radius of germanium (Z = 32) is smaller than the atomic radius of potassium (Z = 19) because of __________

Arrange the following elements in order of increasing electron affinity: Li,O,Ne,P.

Write the condensed electron configuration of S.How many core and how many valence electrons does a sulfur atom contain?

Exam 3: Atomic Structure-Explaining the Properties of Elements

Cesium atomic clocks are based on the emission of microwave radiation at 9,192,631,770 Hz by cesium-133.The wavelength corresponding to this frequency is closest in value to which of the following?

The size of a typical atomic orbital is on the order of __________

In which orbital would an electron feel the highest effective nuclear charge?

What is the energy (E,in J) of a 6.00 ×\times× 1010 Hz photon from a microwave oven?

Which of the following atoms or ions has a single unpaired electron?

Calculate the de Broglie wavelength of an electron (9.11 ×\times× 10-31 kg) when the distance it travels in one second is equal to its wavelength.

Suppose a blue light emitting photons with λ = 470 nm is rated at 60W (60 J of energy are emitted per second) .How many photons are emitted in 5.0 seconds?

Which statement regarding atomic emission spectra and the hydrogen atom is incorrect?

What are the principal and angular momentum quantum numbers for a 4f orbital?

Electron affinity is the energy change that occurs ________________

Which of the following statements regarding degenerate orbitals is correct?

Which of the following sets of quantum numbers is NOT allowed?

The Fraunhofer lines are evidence that __________

A hydrogen atom is excited to ninitial = 8.A 955 nm photon is emitted as the electron falls to nfinal = __________.

You synthesize an atom that appears to fit under francium in the periodic table.Which of the following would you predict is the correct condensed electron configuration for this atom?

What is the de Broglie wavelength of a fast neutron (1.6749 ×\times× 10-27 kg) traveling at 14,000 km/s?

What is the longest wavelength of light emitted by an excited hydrogen atom when nfinal = 1?

The atomic radius of germanium (Z = 32) is smaller than the atomic radius of potassium (Z = 19) because of __________

Arrange the following elements in order of increasing electron affinity: Li,O,Ne,P.

Write the condensed electron configuration of S.How many core and how many valence electrons does a sulfur atom contain?

What is the energy (E,in J) of a 6.00 $\times$ 10¹⁰ Hz photon from a microwave oven?

Calculate the de Broglie wavelength of an electron (9.11 $\times$ 10^-31kg) when the distance it travels in one second is equal to its wavelength.

A hydrogen atom is excited to n_initial = 8.A 955 nm photon is emitted as the electron falls to n_final = __________.

What is the de Broglie wavelength of a fast neutron (1.6749 $\times$ 10^-27 kg) traveling at 14,000 km/s?

What is the longest wavelength of light emitted by an excited hydrogen atom when n_final = 1?