Question 1

Nitrogen has 5 valence electrons. Consider the following electron arrangements.  
-Which represents the ground state for the N- ion?

Accepted Answer

Question 2

Of the following elements, which has occupied d orbitals in its ground-state neutral atoms?

Accepted Answer

A)  Al 
B)  Ba 
C)  Ca 
D)  P 
E)  Cl 
A)  Al 
B)  Ba 
C)  Ca 
D)  P 
E)  Cl

Question 3

The statement that the first ionization energy for an oxygen atom is lower than the first ionization energy for a nitrogen atom is

Accepted Answer

A)  consistent with the general trend relating changes in ionization energy across a period from left to right, because it is harder to take an electron from an oxygen atom than from a nitrogen atom. 
B)  incorrect. 
C)  inconsistent with the general trend relating changes in ionization energy across a period from left to right and due to the fact that the oxygen atom has two doubly occupied 2p orbitals and nitrogen has only one. 
D)  inconsistent with the general trend relating changes in ionization energy across a period from left to right and due to the fact that oxygen has one doubly occupied 2p orbital and nitrogen does not. 
E)  consistent with the general trend relating changes in ionization energy across a period from left to right, because it is easier to take an electron from an oxygen atom than from a nitrogen atom. 
A)  consistent with the general trend relating changes in ionization energy across a period from left to right, because it is harder to take an electron from an oxygen atom than from a nitrogen atom. 
B)  incorrect. 
C)  inconsistent with the general trend relating changes in ionization energy across a period from left to right and due to the fact that the oxygen atom has two doubly occupied 2p orbitals and nitrogen has only one. 
D)  inconsistent with the general trend relating changes in ionization energy across a period from left to right and due to the fact that oxygen has one doubly occupied 2p orbital and nitrogen does not. 
E)  consistent with the general trend relating changes in ionization energy across a period from left to right, because it is easier to take an electron from an oxygen atom than from a nitrogen atom.

Question 4

What is the electron configuration for Cr2+?

Accepted Answer

A)  [Ar] 4s13d5 
B)  [Ar] 4s23d4 
C)  [Ar] 4s23d2 
D)  [Ar] 3d4 
E)  none of these 
A)  [Ar] 4s13d5 
B)  [Ar] 4s23d4 
C)  [Ar] 4s23d2 
D)  [Ar] 3d4 
E)  none of these

Question 5

Which two elements are most likely to have the same oxidation state in an ionic compound?

Accepted Answer

A)  Al, Cl 
B)  S, Ca 
C)  Li, Be 
D)  Cl, F 
E)  none of these 
A)  Al, Cl 
B)  S, Ca 
C)  Li, Be 
D)  Cl, F 
E)  none of these

Question 6

An element E has the electron configuration [Ar]3d104s24p3. What is the formula for the fluoride of E most likely to be?

Accepted Answer

A)  EF6 
B)  EF8 
C)  EF3 
D)  EF 
E)  EF2 
A)  EF6 
B)  EF8 
C)  EF3 
D)  EF 
E)  EF2

Question 7

Write the electron configuration for the following:
-Na

Accepted Answer

The answer of Write the electron configuration for the following:
-Na...

Question 8

How many f orbitals have the value n = 3?

Accepted Answer

A)  3 
B)  1 
C)  0 
D)  5 
E)  7 
A)  3 
B)  1 
C)  0 
D)  5 
E)  7

Question 9

From the following list of observations, choose the one that most clearly supports the conclusion that atoms contain electrons.

Accepted Answer

A)  the emission spectrum of hydrogen 
B)  cathode "rays" 
C)  diffraction 
D)  the photoelectric effect 
E)  the scattering of alpha particles by metal foil 
A)  the emission spectrum of hydrogen 
B)  cathode "rays" 
C)  diffraction 
D)  the photoelectric effect 
E)  the scattering of alpha particles by metal foil

Question 10

From the following list of observations, choose the one that most clearly supports the conclusion that electrons in atoms have quantized energies.

Accepted Answer

A)  the photoelectric effect 
B)  the scattering of alpha particles by metal foil 
C)  diffraction 
D)  cathode "rays" 
E)  the emission spectrum of hydrogen 
A)  the photoelectric effect 
B)  the scattering of alpha particles by metal foil 
C)  diffraction 
D)  cathode "rays" 
E)  the emission spectrum of hydrogen

Question 11

Consider the following sets of quantum numbers. Which set(s) represent(s) impossible combinations?

Accepted Answer

Sets b, d, and f rep

Question 12

Nitrogen has 5 valence electrons. Consider the following electron arrangements.  
-Which represents the ground state for N?

Accepted Answer

The answer of Nitrogen has 5 valence electrons. Consider the...

Question 13

How many unpaired electrons does arsenic have in its ground state?

Accepted Answer

A)  33 
B)  3 
C)  1 
D)  2 
E)  none of these 
A)  33 
B)  3 
C)  1 
D)  2 
E)  none of these

Question 14

What is the electron configuration of the element with atomic number 113?

Accepted Answer

A)  [Rn] 7s25f147d107p1 
B)  [Rn] 7s27f147d107p1 
C)  [Rn] 7s26d107p1 
D)  [Rn] 7s25f146d107p1 
E)  none of these 
A)  [Rn] 7s25f147d107p1 
B)  [Rn] 7s27f147d107p1 
C)  [Rn] 7s26d107p1 
D)  [Rn] 7s25f146d107p1 
E)  none of these

Question 15

What is the valence electron configuration of S?

Accepted Answer

A)  3s23p4 
B)  4s24p4 
C)  1s22s22p63s23p4 
D)  1s22s22p4 
E)  none of these 
A)  3s23p4 
B)  4s24p4 
C)  1s22s22p63s23p4 
D)  1s22s22p4 
E)  none of these

Question 16

How many unpaired electrons does cobalt have in its ground state?

Accepted Answer

A)  7 
B)  27 
C)  5 
D)  3 
E)  1 
A)  7 
B)  27 
C)  5 
D)  3 
E)  1

Question 17

An electron in a 10.0-nm one-dimensional box is excited from the ground state into a higher energy state by absorbing a photon with wavelength 1.374 × 10-5 m. Determine the final energy level for this transition.

Accepted Answer

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

Question 18

The number of unpaired electrons in the outer subshell of a Cl atom is

Accepted Answer

A) 0 
B) 1 
C) 3 
D) 2 
E)  none of these 
A) 0 
B) 1 
C) 3 
D) 2 
E)  none of these

Question 19

Consider the following orderings.
I. Al < Si < P < Cl
II. Be < Mg < Ca < Sr
III. I < Br < Cl < F
IV. NaS1U1P1+S1S1P0 < MgS1U1P12+S1S1P0 < AlS1U1P13+S1S1P0 < SiS1U1P14+S1S1P0
-Which of these give(s) a correct trend in ionization energy?

Accepted Answer

A)  I, IV only 
B)  I, II only 
C)  I, III, IV 
D)  III only 
E)  none of them 
A)  I, IV only 
B)  I, II only 
C)  I, III, IV 
D)  III only 
E)  none of them

Question 20

From the following list of observations, choose the one that most clearly supports the conclusion that electromagnetic radiation has wave characteristics.

Accepted Answer

A)  diffraction 
B)  the emission spectrum of hydrogen 
C)  the scattering of alpha particles by metal foil 
D)  cathode "rays" 
E)  the photoelectric effect 
A)  diffraction 
B)  the emission spectrum of hydrogen 
C)  the scattering of alpha particles by metal foil 
D)  cathode "rays" 
E)  the photoelectric effect

Nitrogen has 5 valence electrons. Consider the following electron arrangements. -Which represents the ground state for the N^- ion?

Of the following elements, which has occupied d orbitals in its ground-state neutral atoms?

The statement that the first ionization energy for an oxygen atom is lower than the first ionization energy for a nitrogen atom is

What is the electron configuration for Cr²⁺?

Which two elements are most likely to have the same oxidation state in an ionic compound?

An element E has the electron configuration [Ar]3d¹⁰4s²4p³. What is the formula for the fluoride of E most likely to be?

Write the electron configuration for the following: -Na

How many f orbitals have the value n = 3?

From the following list of observations, choose the one that most clearly supports the conclusion that atoms contain electrons.

From the following list of observations, choose the one that most clearly supports the conclusion that electrons in atoms have quantized energies.

Consider the following sets of quantum numbers. Which set(s) represent(s) impossible combinations?

Nitrogen has 5 valence electrons. Consider the following electron arrangements. -Which represents the ground state for N?

How many unpaired electrons does arsenic have in its ground state?

What is the electron configuration of the element with atomic number 113?

What is the valence electron configuration of S?

How many unpaired electrons does cobalt have in its ground state?

An electron in a 10.0-nm one-dimensional box is excited from the ground state into a higher energy state by absorbing a photon with wavelength 1.374 × 10^-5 m. Determine the final energy level for this transition.

The number of unpaired electrons in the outer subshell of a Cl atom is

Consider the following orderings. I. Al < Si < P < Cl II. Be < Mg < Ca < Sr III. I < Br < Cl < F IV. Na⁺ < Mg²⁺ < Al³⁺ < Si⁴⁺ -Which of these give(s) a correct trend in ionization energy?

From the following list of observations, choose the one that most clearly supports the conclusion that electromagnetic radiation has wave characteristics.

Atoms, Molecules, and Ions

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Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Liquids and Solids

Properties of Solutions

The Representative Elements

Transition Metals and Coordination Chemistry

The Nucleus: a Chemists View

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Exam 12: Quantum Mechanics and Atomic Theory

Nitrogen has 5 valence electrons. Consider the following electron arrangements. -Which represents the ground state for the N- ion?

Of the following elements, which has occupied d orbitals in its ground-state neutral atoms?

The statement that the first ionization energy for an oxygen atom is lower than the first ionization energy for a nitrogen atom is

What is the electron configuration for Cr2+?

Which two elements are most likely to have the same oxidation state in an ionic compound?

An element E has the electron configuration [Ar]3d104s24p3. What is the formula for the fluoride of E most likely to be?

Write the electron configuration for the following: -Na

How many f orbitals have the value n = 3?

From the following list of observations, choose the one that most clearly supports the conclusion that atoms contain electrons.

From the following list of observations, choose the one that most clearly supports the conclusion that electrons in atoms have quantized energies.

Consider the following sets of quantum numbers. Which set(s) represent(s) impossible combinations?

Nitrogen has 5 valence electrons. Consider the following electron arrangements. -Which represents the ground state for N?

How many unpaired electrons does arsenic have in its ground state?

What is the electron configuration of the element with atomic number 113?

What is the valence electron configuration of S?

How many unpaired electrons does cobalt have in its ground state?

An electron in a 10.0-nm one-dimensional box is excited from the ground state into a higher energy state by absorbing a photon with wavelength 1.374 × 10-5 m. Determine the final energy level for this transition.

The number of unpaired electrons in the outer subshell of a Cl atom is

Consider the following orderings. I. Al < Si < P < Cl II. Be < Mg < Ca < Sr III. I < Br < Cl < F IV. Na+ < Mg2+ < Al3+ < Si4+ -Which of these give(s) a correct trend in ionization energy?

From the following list of observations, choose the one that most clearly supports the conclusion that electromagnetic radiation has wave characteristics.

Atoms, Molecules, and Ions

Stoichiometry

Types of Chemical Reactions and Solution Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Liquids and Solids

Properties of Solutions

The Representative Elements

Transition Metals and Coordination Chemistry

The Nucleus: a Chemists View

Organic and Biochemical Molecules

Filters

Nitrogen has 5 valence electrons. Consider the following electron arrangements. -Which represents the ground state for the N^- ion?

What is the electron configuration for Cr²⁺?

An element E has the electron configuration [Ar]3d¹⁰4s²4p³. What is the formula for the fluoride of E most likely to be?

An electron in a 10.0-nm one-dimensional box is excited from the ground state into a higher energy state by absorbing a photon with wavelength 1.374 × 10^-5 m. Determine the final energy level for this transition.

Consider the following orderings. I. Al < Si < P < Cl II. Be < Mg < Ca < Sr III. I < Br < Cl < F IV. Na⁺ < Mg²⁺ < Al³⁺ < Si⁴⁺ -Which of these give(s) a correct trend in ionization energy?