Question 1

Which of the following atoms is paramagnetic in its ground state?

Accepted Answer

A)  sodium (Na) 
B)  nobelium (No) 
C)  neon (Ne) 
D)  mercury (Hg) 
E)  barium (ba) F) C) and D)
G) B) and C)

Question 2

Which element forms the most acidic oxide?

Accepted Answer

A)  B
B)  Tl
C)  Al
D)  In
E)  GaF) C) and E)
G) C) and D)

Question 3

An element that has the same ground state valence-shell electron configuration as sodium is

Accepted Answer

A)  lithium.
B)  barium.
C)  boron.
D)  lead.
E)  xenon.F) None of the above
G) A) and B)

Question 4

Which of the following ground-state electron configurations corresponds to an atom that has the most negative value of the electron affinity?

Accepted Answer

A)  1s22s22p63s1
B)  1s22s22p63s23p5
C)  1s22s22p63s23p2
D)  1s22s22p63s23p63d54s2
E)  1s22s22p6F) B) and C)
G) None of the above

Question 5

Which of the following electron configurations represents an excited state of the indicated atom?

Accepted Answer

A)  Ne: 1s2 2s2 2p6
B)  N: 1s2 2s2 2p3
C)  P: 1s2 2s2 2p6 3s2 3p2 4s1
D)  Na: 1s2 2s2 2p6 3s2 3p2 3s1
E)  He: 1s2F) B) and D)
G) A) and C)

Question 6

Rank the following atoms in order of the largest to smallest atomic radius: B,B,B,C.

Accepted Answer

A)  C > B > B > B
B)  B > C > B > B
C)  B > B > C > B
D)  B > B > B > CE) B) and C)
F) All of the above

Question 7

When arranged in order of increasing atomic number,the elements exhibit periodicity for all the following properties except

Accepted Answer

A)  electron affinity.
B)  color.
C)  ionization energy.
D)  electron configuration.
E)  atomic radius.F) A) and C)
G) All of the above

Question 8

The change in energy for which of the following processes corresponds to the first ionization energy of beryllium?

Accepted Answer

A)  Be(g) → Be+(g) + e-
B)  Be(s) → Be+(s) + e-
C)  Be(s) → Be+(g) + e-
D)  Be(g) → Be2+(g) + 2e-
E)  Be(s) + e- → Be-(s) F) C) and E)
G) D) and E)

Question 9

An atom of which of the following elements has the smallest first ionization energy?

Accepted Answer

A)  Te
B)  Po
C)  Se
D)  O
E)  SF) A) and C)
G) A) and E)

Question 10

Which ground-state electron configuration is incorrect?

Accepted Answer

A)  Br:[Ar]3d104s24p5
B)  K:[Ar]4s1
C)  Fe:[Ar]3d5
D)  Na:1s22s22p63s1
E)  Zn:[Ar]3d104s2F) B) and E)
G) C) and E)

Question 11

Which of the following electron configurations is impossible,according to the Pauli exclusion principle?

Accepted Answer

A)  1s22s22p5
B)  1s22s22p3
C)  1s22s5
D)  ​1s22s22p63s1
E)  1s22s22p2F) D) and E)
G) A) and C)

Question 12

An atom of which of the following elements has the largest atomic radius?

Accepted Answer

A)  Ge
B)  Rb
C)  F
D)  Ca
E)  PF) D) and E)
G) A) and D)

Question 13

Which of the following statements is true concerning the electron configuration [Ne]3p2?

Accepted Answer

A)  This configuration cannot be the ground-state electron configuration for a Mg atom because it violates the Pauli exclusion principle.
B)  This configuration cannot be the ground-state electron configuration for a Mg atom because it violates Hund's rule.
C)  This configuration is the ground-state electron configuration for a Mg atom.
D)  This configuration cannot be the ground-state electron configuration for a Mg atom because it violates the Heisenberg uncertainty principle.
E)  This configuration cannot be the ground-state electron configuration for a Mg atom because it violates the Aufbau principle.F) A) and B)
G) A) and C)

Question 14

Which of the following statements is true concerning a concentrated solution of lithium oxide in water?

Accepted Answer

A)  The resulting solution is strongly basic.
B)  The resulting solution is weakly acidic.
C)  The resulting solution is neither acidic nor basic.
D)  The resulting solution is weakly basic.
E)  The resulting solution is strongly acidic.F) A) and E)
G) C) and D)

Question 15

Which of the following statements is true concerning the electron configuration [Ne]3s13p1?

Accepted Answer

A)  It may represent a ground-state electron configuration of a Al+ cation.
B)  It may represent an excited-state electron configuration of a Mg atom.
C)  It may represent an excited-state electron configuration of a Ne- anion.
D)  It may represent a ground-state electron configuration of a Mg+ cation.
E)  It may represent a ground-state electron configuration of a Na+ cation.F) All of the above
G) A) and B)

Question 16

An atom of which of the following elements has the smallest atomic radius?

Accepted Answer

A)  P
B)  Cl
C)  S
D)  Na
E)  SiF) B) and D)
G) All of the above

Question 17

The Pauli exclusion principle states that

Accepted Answer

A)  the wavelength of a photon of light times its frequency is equal to the speed of light.
B)  no two electrons in the same atom can have the same set of four quantum numbers.
C)  both the position of an electron and its momentum cannot be known simultaneously very accurately.
D)  the wavelength and mass of a subatomic particle are related by  .
E)  an electron can have either particle character or wave character.F) All of the above
G) C) and D)

Question 18

What is the maximum number of electrons that can be accommodated in the n = 1 shell?

Accepted Answer

A)  2
B)  6
C)  4
D)  8
E)  10F) A) and B)
G) B) and E)

Question 19

Mendeleev's periodic table (1869) can be explained by the periodicity of the _____.

Accepted Answer

A)  ​number of orbits around the nucleus
B)  ​atomic radii of elements
C)  ​atomic mass of elements
D)  ​positive charge present in the nucleus of atoms
E)  ​ground-state electron configurations of atomsF) A) and B)
G) A) and C)

Question 20

The properties of _____ were remarkably close to those Mendeleev predicted for eka-aluminum.

Accepted Answer

A)  ​scandium
B)  ​germanium
C)  ​gallium
D)  ​selenium
E)  ​telluriumF) None of the above
G) A) and D)

Exam 8: Electron Configurations and Periodicity

Mendeleev's periodic table (1869) can be explained by the periodicity of the _____.

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Which ground-state electron configuration is incorrect?

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Which of the following statements is true concerning the electron configuration [Ne]3p2?

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Which of the following statements is true concerning a concentrated solution of lithium oxide in water?

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Which of the following electron configurations represents an excited state of the indicated atom?

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Rank the following atoms in order of the largest to smallest atomic radius: B,B,B,C.

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Which element forms the most acidic oxide?

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An atom of which of the following elements has the smallest first ionization energy?

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An element that has the same ground state valence-shell electron configuration as sodium is

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Which of the following statements is true concerning the electron configuration [Ne]3s13p1?

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Which of the following electron configurations is impossible,according to the Pauli exclusion principle?

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Which of the following ground-state electron configurations corresponds to an atom that has the most negative value of the electron affinity?

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An atom of which of the following elements has the smallest atomic radius?

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The change in energy for which of the following processes corresponds to the first ionization energy of beryllium?

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Which of the following atoms is paramagnetic in its ground state?

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The properties of _____ were remarkably close to those Mendeleev predicted for eka-aluminum.

Correct AnswerverifiedShow Answer

What is the maximum number of electrons that can be accommodated in the n = 1 shell?

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The Pauli exclusion principle states that

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When arranged in order of increasing atomic number,the elements exhibit periodicity for all the following properties except

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An atom of which of the following elements has the largest atomic radius?

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Which of the following statements is true concerning the electron configuration [Ne]3p²?

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Which of the following statements is true concerning the electron configuration [Ne]3s¹3p¹?

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