Question 1

Which element has the following ground-state electron configuration
1s22s22p63s2

Accepted Answer

A)  Na 
B)  Mg 
C)  Al 
D)  Si 
E)  Ne 
A)  Na 
B)  Mg 
C)  Al 
D)  Si 
E)  Ne

Question 2

Electrons can be used to probe the arrangement of atoms on a solid surface if the wavelength of the electrons is comparable with the spacing between the atoms. Which of the following electron velocities would be appropriate for use in this application if the atoms are separated by 0.320 nm

Accepted Answer

A)  1.24 * 103 m/s 
B)  8.06 * 103 m/s 
C)  2.27 * 106 m/s 
D)  4.41 * 106 m/s 
E)  3.00 * 108 m/s 
A)  1.24 * 103 m/s 
B)  8.06 * 103 m/s 
C)  2.27 * 106 m/s 
D)  4.41 * 106 m/s 
E)  3.00 * 108 m/s

Question 3

Which of the following electronic transitions is consistent with an increase in energy

Accepted Answer

A)  From a 4s subshell to a 3d subshell 
B)  From a 5p subshell to a 4d subshell 
C)  From a 4d subshell to a 5s subshell 
D)  From a 4f subshell to a 6s subshell 
E)  From a 5d subshell to a 6s subshell 
A)  From a 4s subshell to a 3d subshell 
B)  From a 5p subshell to a 4d subshell 
C)  From a 4d subshell to a 5s subshell 
D)  From a 4f subshell to a 6s subshell 
E)  From a 5d subshell to a 6s subshell

Question 4

What is the electron configuration of calcium

Accepted Answer

A)  1s22s22p63s23p64s1 or [Ar]4s1 
B)  1s22s22p63s23p6 or [Ar] 
C)  1s22s22p63s23p64s3 or [Ar]4s3 
D)  1s22s22p63s23p64s2 or [Ar]4s2 
E)  None of the above 
A)  1s22s22p63s23p64s1 or [Ar]4s1 
B)  1s22s22p63s23p6 or [Ar] 
C)  1s22s22p63s23p64s3 or [Ar]4s3 
D)  1s22s22p63s23p64s2 or [Ar]4s2 
E)  None of the above

Question 5

The orbital diagram for a ground state carbon atom is

Accepted Answer

The answer of The orbital diagram for a ground state...

Question 6

Lanthanide (or rare earth) elements have atoms or ions with partially filled

Accepted Answer

A)  s subshells. 
B)  p subshells. 
C)  d subshells. 
D)  f subshells. 
E)  g subshells. 
A)  s subshells. 
B)  p subshells. 
C)  d subshells. 
D)  f subshells. 
E)  g subshells.

Question 7

What is the energy in joules of a mole of photons associated with red light of wavelength 7.00 * 102 nm

Accepted Answer

A)  4.72 * 10-43 J 
B)  1.71 * 105 J 
C)  12.4 kJ 
D)  256 kJ 
E)  2.12 * 1042 J 
A)  4.72 * 10-43 J 
B)  1.71 * 105 J 
C)  12.4 kJ 
D)  256 kJ 
E)  2.12 * 1042 J

Question 8

According to de Broglie's equation, the wavelength associated with the motion of a particle increases as the particle mass decreases.

Accepted Answer

A) True 
 B)False

Question 9

The following set of quantum numbers is correct.n = 3, l = 3, ml = 0, ms = +1/2

Accepted Answer

A) True 
 B)False

Question 10

A ground-state atom of vanadium has ___ unpaired electrons and is _____.

Accepted Answer

A)  0, diamagnetic 
B)  2, diamagnetic 
C)  3, paramagnetic 
D)  5, paramagnetic 
E)  4, diamagnetic 
A)  0, diamagnetic 
B)  2, diamagnetic 
C)  3, paramagnetic 
D)  5, paramagnetic 
E)  4, diamagnetic

Question 11

A possible set of quantum numbers to describe an electron in a 3d subshell is

Accepted Answer

A)  n = 3, l = 0, ml = 0 , ms = +1/2 
B)  n = 3, l = 1, ml = 0, ms = - 1/2 
C)  n = 3, l = 2, ml = 1, ms = +1/2 
D)  n = 3, l = 3, ml = 1, ms = - 1/2 
E)  n = 2, l = 0, ml = 0, ms = +1/2 
A)  n = 3, l = 0, ml = 0 , ms = +1/2 
B)  n = 3, l = 1, ml = 0, ms = - 1/2 
C)  n = 3, l = 2, ml = 1, ms = +1/2 
D)  n = 3, l = 3, ml = 1, ms = - 1/2 
E)  n = 2, l = 0, ml = 0, ms = +1/2

Question 12

The electron in a hydrogen atom falls from an excited energy level to the ground state in two steps, causing the emission of photons with wavelengths of 2624 nm and 97.2 nm, respectively. What is the principal quantum number or shell of the initial excited energy level from which the electron falls

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  6 
E)  8 
A)  2 
B)  3 
C)  4 
D)  6 
E)  8

Question 13

Of the following which, if any, provides the correct ground state electron configuration for the phosphorus atom

Accepted Answer

A)  [Ne] 3s23p2 or 1s22s22p63s23p2 
B)  [Ne] 3s23p3 or 1s22s22p63s23p3 
C)  [Ne] 3s23p4 or 1s22s22p63s23p4 
D)  [Ne] 3s23p5 or 1s22s22p63s23p5 
E)  None of the above 
A)  [Ne] 3s23p2 or 1s22s22p63s23p2 
B)  [Ne] 3s23p3 or 1s22s22p63s23p3 
C)  [Ne] 3s23p4 or 1s22s22p63s23p4 
D)  [Ne] 3s23p5 or 1s22s22p63s23p5 
E)  None of the above

Question 14

A proton is roughly 1800 times more massive than an electron. If a proton and an electron have the same kinetic energy,

Accepted Answer

A)  the wavelength of the proton will be about 1800 times longer than the wavelength of the electron. 
B) the wavelength of the proton will be about $\sqrt{1800}$ times longer than the wavelength of the electron. 
C)  the wavelength of the proton will be roughly equal to the wavelength of the electron. 
D) the wavelength of the electron will be about $\sqrt{1800}$ times longer than the wavelength of the proton. 
E)  the wavelength of the electron will be about 1800 times longer than the wavelength of the proton. 
A)  the wavelength of the proton will be about 1800 times longer than the wavelength of the electron. 
B) the wavelength of the proton will be about $\sqrt{1800}$ times longer than the wavelength of the electron. 
C)  the wavelength of the proton will be roughly equal to the wavelength of the electron. 
D) the wavelength of the electron will be about $\sqrt{1800}$ times longer than the wavelength of the proton. 
E)  the wavelength of the electron will be about 1800 times longer than the wavelength of the proton.

Question 15

Calculate the energy of a photon of light with a wavelength of 360 nm.

Accepted Answer

A)  3.5 * 10-19 J 
B)  4.5 * 10-19 J 
C)  5.5 * 10-19 J 
D)  6.5 * 10-19 J 
E)  None of the above 
A)  3.5 * 10-19 J 
B)  4.5 * 10-19 J 
C)  5.5 * 10-19 J 
D)  6.5 * 10-19 J 
E)  None of the above

Question 16

The scattering of helium atoms by a solid can be used to gain information about the lattice of atoms, provided the wavelength of the helium atoms is comparable to the dimensions of the lattice. What is the wavelength, in picometers, of a helium-4 atom with a kinetic energy of 0.10 eV (Mass of 4He = 4.0026 amu; 1 amu = 1.67 * 10-24 g; 1 eV = 1.602 * 10-19 J; h = 6.626 * 10-34 J*s)

Accepted Answer

A)  55 pm 
B)  45 pm 
C)  35 pm 
D)  25 pm 
E)  None of the above 
A)  55 pm 
B)  45 pm 
C)  35 pm 
D)  25 pm 
E)  None of the above

Question 17

Which one of the following sets of quantum numbers represents an electron with the highest energy

Accepted Answer

A)  n = 3, l = 2, ml = -2, ms = +1/2 
B)  n = 4, l = 1, ml = 0, ms = -1/2 
C)  n = 4, l = 0, ml = 0, ms = +1/2 
D)  n = 5, l = 0, ml = 0, ms = +1/2 
E)  n = 4, l = 2, ml = -1, ms = -1/2 
A)  n = 3, l = 2, ml = -2, ms = +1/2 
B)  n = 4, l = 1, ml = 0, ms = -1/2 
C)  n = 4, l = 0, ml = 0, ms = +1/2 
D)  n = 5, l = 0, ml = 0, ms = +1/2 
E)  n = 4, l = 2, ml = -1, ms = -1/2

Question 18

Calculate the wavelength, in nanometers, of the light emitted by a hydrogen atom when its electron falls from the n = 7 to the n = 4 principal energy level. Recall that the energy levels of the H atom are given by En = -2.18 * 10-18 J(1/n2)

Accepted Answer

A)  9.18 * 10-20 nm 
B)  4.45 * 10-20 nm 
C)  2.16 * 10-6 nm 
D)  2.16 * 103 nm 
E)  1.38 * 1014 nm 
A)  9.18 * 10-20 nm 
B)  4.45 * 10-20 nm 
C)  2.16 * 10-6 nm 
D)  2.16 * 103 nm 
E)  1.38 * 1014 nm

Question 19

What is the energy in joules of one photon of x-ray radiation with a wavelength of 0.120 nm

Accepted Answer

A)  2.50 x 109 J 
B)  1.66 x 10-24 J 
C)  1.66 x 10-33 J 
D)  2.50 x 1018J 
E)  1.66 x 10-15J 
A)  2.50 x 109 J 
B)  1.66 x 10-24 J 
C)  1.66 x 10-33 J 
D)  2.50 x 1018J 
E)  1.66 x 10-15J

Question 20

A neon atom in its ground state will be diamagnetic.

Accepted Answer

A) True 
 B)False

Exam 7: Quantum Theory and the Electronic Structure of Atoms

Which element has the following ground-state electron configuration 1s22s22p63s2

Electrons can be used to probe the arrangement of atoms on a solid surface if the wavelength of the electrons is comparable with the spacing between the atoms. Which of the following electron velocities would be appropriate for use in this application if the atoms are separated by 0.320 nm

Which of the following electronic transitions is consistent with an increase in energy

What is the electron configuration of calcium

The orbital diagram for a ground state carbon atom is

Lanthanide (or rare earth) elements have atoms or ions with partially filled

What is the energy in joules of a mole of photons associated with red light of wavelength 7.00 * 102 nm

According to de Broglie's equation, the wavelength associated with the motion of a particle increases as the particle mass decreases.

The following set of quantum numbers is correct.n = 3, l = 3, ml = 0, ms = +1/2

A ground-state atom of vanadium has ___ unpaired electrons and is _____.

A possible set of quantum numbers to describe an electron in a 3d subshell is

The electron in a hydrogen atom falls from an excited energy level to the ground state in two steps, causing the emission of photons with wavelengths of 2624 nm and 97.2 nm, respectively. What is the principal quantum number or shell of the initial excited energy level from which the electron falls

Of the following which, if any, provides the correct ground state electron configuration for the phosphorus atom

A proton is roughly 1800 times more massive than an electron. If a proton and an electron have the same kinetic energy,

Calculate the energy of a photon of light with a wavelength of 360 nm.

Which one of the following sets of quantum numbers represents an electron with the highest energy

Calculate the wavelength, in nanometers, of the light emitted by a hydrogen atom when its electron falls from the n = 7 to the n = 4 principal energy level. Recall that the energy levels of the H atom are given by En = -2.18 * 10-18 J(1/n2)

What is the energy in joules of one photon of x-ray radiation with a wavelength of 0.120 nm

A neon atom in its ground state will be diamagnetic.

Chemistry: The Study of Change

Atoms Molecules and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

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Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metals Chemistry and Coordination Compounds

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Filters

Which element has the following ground-state electron configuration 1s²2s²2p⁶3s²

What is the energy in joules of a mole of photons associated with red light of wavelength 7.00 * 10² nm

The following set of quantum numbers is correct.n = 3, l = 3, m_l = 0, m_s = +1/2

A ground-state atom of vanadium has _ unpaired electrons and is ___.

Calculate the wavelength, in nanometers, of the light emitted by a hydrogen atom when its electron falls from the n = 7 to the n = 4 principal energy level. Recall that the energy levels of the H atom are given by E_n = -2.18 * 10^-18 J(1/n²)