Question 1

For C would the Zeff be larger for the 2s or the 2p Hartree orbital?

Accepted Answer

A)  Zeff(2s) would be larger 
B)  Zeff(2p) would be larger 
C)  Zeff(2s) would be equal to Zeff(2p) 
D)  it depends on the spin 
A)  Zeff(2s) would be larger 
B)  Zeff(2p) would be larger 
C)  Zeff(2s) would be equal to Zeff(2p) 
D)  it depends on the spin

Question 2

A photoelectron spectrum of sodium excited with x-rays with an energy of 1254 eV shows two peaks at kinetics energies of 1190 eV and 1223 eV. These peaks are assigned to the sodium 2s and 2p electrons. What is the energy of the 2s electron in sodium?

Accepted Answer

A)  -31 eV 
B)  -33 eV 
C)  -64 eV 
D)  -128 eV 
E)  -1190 eV 
A)  -31 eV 
B)  -33 eV 
C)  -64 eV 
D)  -128 eV 
E)  -1190 eV

Question 3

Of the following angular components for the wave functions of one-electron atoms, which one(s) must correspond only to s type orbitals?

Accepted Answer

A) $Y=\left(\frac{3}{4 \pi}\right)^{\frac{1}{2}} \cos \theta$ 
B) $Y=\left(\frac{3}{4 \pi}\right)^{\frac{1}{2}} \sin \theta \cos \phi$ 
C) $Y=\left(\frac{15}{16 \pi}\right)^{\frac{1}{2}} \sin ^{2} \theta \cos 2 \phi$ 
D) $Y=\left(\frac{1}{4 \pi}\right)^{\frac{1}{2}}$ 
E)  B and C 
A) $Y=\left(\frac{3}{4 \pi}\right)^{\frac{1}{2}} \cos \theta$ 
B) $Y=\left(\frac{3}{4 \pi}\right)^{\frac{1}{2}} \sin \theta \cos \phi$ 
C) $Y=\left(\frac{15}{16 \pi}\right)^{\frac{1}{2}} \sin ^{2} \theta \cos 2 \phi$ 
D) $Y=\left(\frac{1}{4 \pi}\right)^{\frac{1}{2}}$ 
E)  B and C

Question 4

What do you predict of the electron configuration of element 117?

Accepted Answer

A)  [Rn]7s25f146d107p5 
B)  [Rn]7s26d107p6 
C)  [Rn]7s15f146d107p6 
D)  [Rn]7s27f147d107p5 
E)  [Rn]7s24f143d107p5 
A)  [Rn]7s25f146d107p5 
B)  [Rn]7s26d107p6 
C)  [Rn]7s15f146d107p6 
D)  [Rn]7s27f147d107p5 
E)  [Rn]7s24f143d107p5

Question 5

How many radial and angular nodes does a 4p orbital for a one electron atom have?

Accepted Answer

A)  3 radial, 1 angular 
B)  2 radial, 2 angular 
C)  2 radial, 1 angular 
D)  2 radial, 0 angular 
E)  1 radial, 1 angular 
A)  3 radial, 1 angular 
B)  2 radial, 2 angular 
C)  2 radial, 1 angular 
D)  2 radial, 0 angular 
E)  1 radial, 1 angular

Question 6

The wavefunction for the 2s orbital in hydrogen is given by $R_{2 s}=\frac{1}{2 \sqrt{2}}\left(\frac{Z}{a_{0}}\right)^{3 / 2}(2-\sigma) \exp (-\sigma / 2) \text { where } \sigma=\frac{\mathrm{Zr}}{a_{0}}$ At what radius is there a node?

Accepted Answer

A)  r = 0 
B)  r = 2/a0 
C)  r = a0 
D)  r = 2a0 
E)  there are no radial nodes in this function 
A)  r = 0 
B)  r = 2/a0 
C)  r = a0 
D)  r = 2a0 
E)  there are no radial nodes in this function

Question 7

Which of the following would you expect to have unpaired electrons?

Accepted Answer

A)  Be 
B)  Zn 
C)  Ne 
D)  Si 
E)  none of the above 
A)  Be 
B)  Zn 
C)  Ne 
D)  Si 
E)  none of the above

Question 8

Given that the first ionization energy O is lower than that of N what would you predict for the Zeff(2p) in these atoms?

Accepted Answer

A)  Zeff(2p) is larger in N than in O 
B)  Zeff(2p) is larger in O than in N 
C)  they are exactly the same 
D)  the ionization energy cannot be related to Zeff(2p) 
A)  Zeff(2p) is larger in N than in O 
B)  Zeff(2p) is larger in O than in N 
C)  they are exactly the same 
D)  the ionization energy cannot be related to Zeff(2p)

Question 9

Which species is diamagnetic?

Accepted Answer

A)  N 
B)  Ne 
C)  O 
D)  A and B 
E)  None of the above 
A)  N 
B)  Ne 
C)  O 
D)  A and B 
E)  None of the above

Question 10

Which group of atoms and ions is isoelectronic?

Accepted Answer

A)  O2-, F-, Ne, Li+ 
B)  O2-, F-, Ne, Mg2+ 
C)  Na+, Li+, Mg2+, Ca2+ 
D)  F-, Cl-, Br-, Ar 
E)  F-, S2-, He 
A)  O2-, F-, Ne, Li+ 
B)  O2-, F-, Ne, Mg2+ 
C)  Na+, Li+, Mg2+, Ca2+ 
D)  F-, Cl-, Br-, Ar 
E)  F-, S2-, He

Question 11

What is the electronic configuration for Si?

Accepted Answer

A)  [He]2s22p2 
B)  [Ne]2p4 
C)  [Ne]3p4 
D)  [Ne]3s23p2 
E)  [Na]3s22p2 
A)  [He]2s22p2 
B)  [Ne]2p4 
C)  [Ne]3p4 
D)  [Ne]3s23p2 
E)  [Na]3s22p2

Question 12

Given that Zeff(2s) in Li is 1.26, estimate the energy of the 2s electron in Li in Rhydberg units.

Accepted Answer

A)  -0.40 
B)  -0.63 
C)  -0.79 
D)  -1.26 
E)  -4.0 
A)  -0.40 
B)  -0.63 
C)  -0.79 
D)  -1.26 
E)  -4.0

Question 13

Given that the electronic configuration of Cu is [Ar]3d104s1 what is the electronic configuration of Cu+?

Accepted Answer

A)  [Ar]3d10 
B)  [Ar]3d94s1 
C)  [Ar]3d104s2 
D)  [Ne]3s23p53d104s1 
E)  [Ne]3s13p63d104s1 
A)  [Ar]3d10 
B)  [Ar]3d94s1 
C)  [Ar]3d104s2 
D)  [Ne]3s23p53d104s1 
E)  [Ne]3s13p63d104s1

For C would the Z_eff be larger for the 2s or the 2p Hartree orbital?

A photoelectron spectrum of sodium excited with x-rays with an energy of 1254 eV shows two peaks at kinetics energies of 1190 eV and 1223 eV. These peaks are assigned to the sodium 2s and 2p electrons. What is the energy of the 2s electron in sodium?

Of the following angular components for the wave functions of one-electron atoms, which one(s) must correspond only to s type orbitals?

What do you predict of the electron configuration of element 117?

How many radial and angular nodes does a 4p orbital for a one electron atom have?

The wavefunction for the 2s orbital in hydrogen is given by $R_{2 s}=\frac{1}{2 \sqrt{2}}\left(\frac{Z}{a_{0}}\right)^{3 / 2}(2-\sigma) \exp (-\sigma / 2) \text { where } \sigma=\frac{\mathrm{Zr}}{a_{0}}$ At what radius is there a node?

Which of the following would you expect to have unpaired electrons?

Given that the first ionization energy O is lower than that of N what would you predict for the Z_eff(2p) in these atoms?

Which species is diamagnetic?

Which group of atoms and ions is isoelectronic?

What is the electronic configuration for Si?

Given that Z_eff(2s) in Li is 1.26, estimate the energy of the 2s electron in Li in Rhydberg units.

Given that the electronic configuration of Cu is [Ar]3d¹⁰4s¹ what is the electronic configuration of Cu⁺?

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Bonding in Organic Molecules

Binding in Transition Metal Compounds and Coordination Complexes

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Exam 5: Quantum Mechanics and Atomic Structure

For C would the Zeff be larger for the 2s or the 2p Hartree orbital?

A photoelectron spectrum of sodium excited with x-rays with an energy of 1254 eV shows two peaks at kinetics energies of 1190 eV and 1223 eV. These peaks are assigned to the sodium 2s and 2p electrons. What is the energy of the 2s electron in sodium?

Of the following angular components for the wave functions of one-electron atoms, which one(s) must correspond only to s type orbitals?

What do you predict of the electron configuration of element 117?

How many radial and angular nodes does a 4p orbital for a one electron atom have?

Which of the following would you expect to have unpaired electrons?

Given that the first ionization energy O is lower than that of N what would you predict for the Zeff(2p) in these atoms?

Which species is diamagnetic?

Which group of atoms and ions is isoelectronic?

What is the electronic configuration for Si?

Given that Zeff(2s) in Li is 1.26, estimate the energy of the 2s electron in Li in Rhydberg units.

Given that the electronic configuration of Cu is [Ar]3d104s1 what is the electronic configuration of Cu+?

The Atom in Modern Chemistry

Chemical Formulas, Equations, and Reaction Yields

Chemical Bonding: the Classical Description

Introduction to Quantum Mechanics

Quantum Mechanics and Molecular Structure

Bonding in Organic Molecules

Binding in Transition Metal Compounds and Coordination Complexes

The Gaseous State

Solids, Liquids, and Phase Transitions

Solutions

Thermodynamic Processes and Thermochemistry

Spontaneous Processes and Thermodynamic Equilibrium

Chemical Equilibrium

Acid-Base Equilibria

Solubility and Precipitation Equilibria

Electrochemistry

Chemical Kinetics

Nuclear Chemistry

Molecular Spectroscopy and Photochemistry

Structure and Bonding in Solids

Inorganic Materials

Polymeric Materials and Soft Condensed Matter

Filters

For C would the Z_eff be larger for the 2s or the 2p Hartree orbital?

Given that the first ionization energy O is lower than that of N what would you predict for the Z_eff(2p) in these atoms?

Given that Z_eff(2s) in Li is 1.26, estimate the energy of the 2s electron in Li in Rhydberg units.

Given that the electronic configuration of Cu is [Ar]3d¹⁰4s¹ what is the electronic configuration of Cu⁺?