Question 1

Which of the following elements has the largest atomic size?

Accepted Answer

A)  S
B)  Ca
C)  Ba
D)  Po
E)  RnF) A) and E)
G) None of the above

Question 2

First ionization energies of neutral atoms may be positive or negative.

Accepted Answer

A) True 
 B)False

Question 3

Bigger atoms generally have smaller ionization energies.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following electron configurations is correct for the excited state of an element?

Accepted Answer

A)  [He]2 s 22 p 5
B)  [Ne]3 s 23 p 1
C)  [Ar]4 s 14 p 1
D)  [Kr]5 s 24 d 7
E)  [He]1 p 1F) A) and D)
G) C) and E)

Question 5

The effective nuclear charge for an atom is less than the actual nuclear charge due to

Accepted Answer

A)  shielding.
B)  penetration.
C)  paramagnetism.
D)  electron-pair repulsion.
E)  relativity.F) None of the above
G) C) and D)

Question 6

The electronic structure 1s22s22p63s23p64s23d8 refers to the ground state of

Accepted Answer

A)  Kr.
B)  Ni.
C)  Fe.
D)  Pd.
E)  None of these choices are correct.F) A) and B)
G) C) and E)

Question 7

In Mendeleev's version of the periodic table, the elements were arranged in order of increasing atomic number.

Accepted Answer

A) True 
 B)False

Question 8

In neutral atoms, the 3d orbitals have higher energy than the 4s orbitals.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following atoms will be diamagnetic?

Accepted Answer

A)  Cr
B)  Ru
C)  Fe
D)  Pt
E)  CdF) A) and D)
G) All of the above

Question 10

Which one of the following equations correctly represents the process involved in the electron affinity of X?

Accepted Answer

A)  X( g) → X +( g) + e −
B)  X +( g) → X +( aq) 
C)  X +( g) + e − → X( g) 
D)  X( g) + e − → X −( g) 
E)  X +( g) + Y −( g) → XY( s) F) A) and E)
G) A) and C)

Question 11

The most basic oxides are formed from elements found in the __________ region of the periodic table.

Accepted Answer

A)  upper right
B)  upper left
C)  center
D)  lower right
E)  lower leftF) A) and B)
G) B) and E)

Question 12

Select the most acidic compound from the following.

Accepted Answer

A)  SO 2
B)  Al 2O 3
C)  CaO
D)  PbO
E)  H 2OF) A) and B)
G) B) and D)

Question 13

Which of the following electron configurations is impossible?

Accepted Answer

A)  1 s 22 s 22 p 63 s 23 p 4
B)  1 s 22 s 22 p 53 s 13 p 4
C)  1 s 22 s 22p 63 s 23 p 63 d 104 s 2
D)  1 s 22 s 22 p 63 s 33 p 4
E)  1 s 12 s 22 p 63 s 23 p 4F) A) and C)
G) A) and E)

Question 14

An atom of element number 33 (As)  is in its ground electronic state. Which one of the following sets quantum numbers could not apply to any of its electrons?

Accepted Answer

A)  n = 2 l = 1 ml = −1 ms = +½
B)  n = 3 l = 0 ml = 0 ms = −½
C)  n = 3 l = 2 ml = −2 ms = −½
D)  n = 4 l = 0 ml = 0 ms = −½
E)  n = 4 l = 2 ml = 1 ms = +½F) A) and B)
G) A) and C)

Question 15

In moving down a group in the periodic table, the oxides of the elements become more acidic in nature.

Accepted Answer

A) True 
 B)False

Question 16

How many valence electrons are there in an atom with the electron configuration [noble gas]ns2(n −1) d10np3?

Accepted Answer

A)  2
B)  3
C)  5
D)  10
E)  15F) A) and D)
G) A) and B)

Question 17

In many-electron atoms, which quantum numbers specify the energy of an electron?

Accepted Answer

A)  n and l
B)  n and ml
C)  l and ml
D)  n and ms
E)  n, l, and mlF) A) and B)
G) B) and E)

Question 18

In the ground state of an atom of silver (Ag) , how many electrons will there be with the quantum number l = 1? (The n, ml, and ms quantum numbers may have any appropriate values.)

Accepted Answer

A)  9
B)  12
C)  18
D)  24
E)  36F) D) and E)
G) A) and B)

Question 19

Which of the following elements has the smallest atomic size?

Accepted Answer

A)  Na
B)  Ar
C)  K
D)  Ca
E)  KrF) A) and C)
G) A) and E)

Question 20

Select the correct electron configuration for sulfur (Z = 16) .

Accepted Answer

A)  1 s 21 p 62 s 22 p 6
B)  1 s 22 s 22 p 83 s 23 p 4
C)  1 s 22 s 22 p 83 s 23 p 2
D)  1 s 22 s 22 p 63 s 23 p 4
E)  1 s 22 s 22 p 63 s 23 d 4F) B) and C)
G) None of the above

Exam 8: Electron Configuration and Chemical Periodicity

Which of the following elements has the largest atomic size?

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The electronic structure 1s22s22p63s23p64s23d8 refers to the ground state of

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Which of the following electron configurations is correct for the excited state of an element?

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Select the most acidic compound from the following.

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Bigger atoms generally have smaller ionization energies.

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In neutral atoms, the 3d orbitals have higher energy than the 4s orbitals.

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The most basic oxides are formed from elements found in the __________ region of the periodic table.

Correct AnswerverifiedShow Answer

In moving down a group in the periodic table, the oxides of the elements become more acidic in nature.

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In the ground state of an atom of silver (Ag) , how many electrons will there be with the quantum number l = 1? (The n, ml, and ms quantum numbers may have any appropriate values.)

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Which of the following atoms will be diamagnetic?

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In Mendeleev's version of the periodic table, the elements were arranged in order of increasing atomic number.

Correct AnswerverifiedShow Answer

An atom of element number 33 (As) is in its ground electronic state. Which one of the following sets quantum numbers could not apply to any of its electrons?

Correct AnswerverifiedShow Answer

The effective nuclear charge for an atom is less than the actual nuclear charge due to

Correct AnswerverifiedShow Answer

In many-electron atoms, which quantum numbers specify the energy of an electron?

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Which of the following elements has the smallest atomic size?

Correct AnswerverifiedShow Answer

Which of the following electron configurations is impossible?

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Which one of the following equations correctly represents the process involved in the electron affinity of X?

Correct AnswerverifiedShow Answer

First ionization energies of neutral atoms may be positive or negative.

Correct AnswerverifiedShow Answer

Select the correct electron configuration for sulfur (Z = 16) .

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How many valence electrons are there in an atom with the electron configuration [noble gas]ns2(n −1) d10np3?

Correct AnswerverifiedShow Answer

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The electronic structure 1s²2s²2p⁶3s²3p⁶4s²3d⁸refers to the ground state of

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In the ground state of an atom of silver (Ag) , how many electrons will there be with the quantum number l = 1? (The n, m_l, and m_s quantum numbers may have any appropriate values.)

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How many valence electrons are there in an atom with the electron configuration [noble gas]ns²(n −1) d¹⁰np³?

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