Question 1

Which one of the following statements about orbital energies is incorrect?

Accepted Answer

A)   In the hydrogen atom, the energy of an orbital depends only on the value of the quantum number n.
B)   In many-electron atoms the energy of an orbital depends on both n and l.
C)   Inner electrons shield outer electrons more effectively than do electrons in the same orbital.
D)   The splitting of sublevels in many-electron atoms is explained in terms of the penetration effect.
E)   The energy of a given orbital increases as the nuclear charge Z increases.F) B) and E)
G) D) and E)

Question 2

Atomic size decreases across a period due to an increase in the effective nuclear charge, Zeff.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following elements has the largest atomic size?

Accepted Answer

A)   S
B)   Ca
C)   Ba
D)   Po
E)   RnF) All of the above
G) B) and E)

Question 4

"Electrons added to atomic orbitals of the same energy will remain unpaired with parallel spins until the subshell is more than half-filled" is a statement of

Accepted Answer

A)   the aufbau principle.
B)   Hund's rule.
C)   the Pauli exclusion principle.
D)   the periodic law.
E)   the singularity rule.F) B) and D)
G) A) and B)

Question 5

Elements in the same period of the periodic table have similar valence shell electron configurations.

Accepted Answer

A) True 
 B)False

Question 6

Moseley's measurements of nuclear charges of the elements provided the basis for arranging the elements of the periodic table in order of increasing atomic number.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following elements has the largest first ionization energy?

Accepted Answer

A)   Na
B)   Cl
C)   Ca
D)   Te
E)   BrF) A) and D)
G) A) and B)

Question 8

In a single atom, write down the maximum possible number of electrons
a. with n = 3
b. with the designation 4dxy
c. with n = 5, l = 3, ms = +

Accepted Answer

Question 9

Select the correct electron configuration for Te (Z = 52) .

Accepted Answer

A)   [Kr]5s25p64d8
B)   [Kr]5s25d105p4
C)   [Kr]5s24d105p6
D)   [Kr]5s24f14
E)   [Kr]5s24d105p4F) B) and C)
G) A) and D)

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

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) All of the above
G) A) and B)

Question 12

According to the exclusion principle, two is the maximum number of electrons in an atom which can share the same four quantum numbers.

Accepted Answer

A) True 
 B)False

Question 13

Elements with the highest first ionization energies are found in the ___________ region of the periodic table.

Accepted Answer

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

Question 14

Which of the following elements is paramagnetic?

Accepted Answer

A)   Kr
B)   Zn
C)   Sr
D)   V
E)   ArF) A) and B)
G) A) and C)

Question 15

Write down the full electron configuration for ground state atoms of
a. element number 12.
b. element number 23.
c. element number 32.

Accepted Answer

a. 1s²2s²2p⁶3s² b. 1s²2s²2p⁶3s²3p⁶4s²3d³ c. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p²

Question 16

Which of the following electron configurations is impossible?

Accepted Answer

A)   1s22s22p63s23p4
B)   1s22s22p53s13p4
C)   1s22s22p63s23p63d104s2
D)   1s22s22p63s33p4
E)   1s12s22p63s23p4F) D) and E)
G) A) and B)

Question 17

Which of the following sets of elements have the [noble gas]ns2np2 valence electron configuration?

Accepted Answer

A)   O, S, Se, Te, Po
B)   N, P, As, Sb, Bi
C)   F, Cl, Br, I, At
D)   C, Si, Ge, Sn, Pb
E)   Ti, Zr, HfF) C) and D)
G) A) and B)

Question 18

Select the paramagnetic ion.

Accepted Answer

A)   Cu+
B)   Ag+
C)   Fe3+
D)   Cd2+
E)   Ca2+F) None of the above
G) A) and B)

Question 19

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) B) and E)
G) A) and E)

Question 20

Which of the following has the most negative electron affinity?

Accepted Answer

A)   H
B)   Li
C)   Na
D)   K
E)   RbF) C) and E)
G) None of the above A

Exam 8: Electron Configuration and Chemical Periodicity

Which one of the following statements about orbital energies is incorrect?

Correct AnswerverifiedShow Answer

Atomic size decreases across a period due to an increase in the effective nuclear charge, Zeff.

Correct AnswerverifiedShow Answer

Which of the following elements has the largest atomic size?

Correct AnswerverifiedShow Answer

"Electrons added to atomic orbitals of the same energy will remain unpaired with parallel spins until the subshell is more than half-filled" is a statement of

Correct AnswerverifiedShow Answer

Elements in the same period of the periodic table have similar valence shell electron configurations.

Correct AnswerverifiedShow Answer

Moseley's measurements of nuclear charges of the elements provided the basis for arranging the elements of the periodic table in order of increasing atomic number.

Correct AnswerverifiedShow Answer

Which of the following elements has the largest first ionization energy?

Correct AnswerverifiedShow Answer

In a single atom, write down the maximum possible number of electrons a. with n = 3 b. with the designation 4dxy c. with n = 5, l = 3, ms = +

Correct AnswerverifiedShow Answer

Select the correct electron configuration for Te (Z = 52) .

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.)

Correct AnswerverifiedShow Answer

According to the exclusion principle, two is the maximum number of electrons in an atom which can share the same four quantum numbers.

Correct AnswerverifiedShow Answer

Elements with the highest first ionization energies are found in the ___________ region of the periodic table.

Correct AnswerverifiedE

Which of the following elements is paramagnetic?

Correct AnswerverifiedShow Answer

Write down the full electron configuration for ground state atoms of a. element number 12. b. element number 23. c. element number 32.

Correct Answerverifieda. 1s22s22p63s2 b. 1s22s22p63s23p64s23d3 c. 1s22s22p63s23p64s23d104p2

Which of the following electron configurations is impossible?

Correct AnswerverifiedShow Answer

Which of the following sets of elements have the [noble gas]ns2np2 valence electron configuration?

Correct AnswerverifiedShow Answer

Select the paramagnetic ion.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following has the most negative electron affinity?

Correct AnswerverifiedA

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Atomic size decreases across a period due to an increase in the effective nuclear charge, Z_eff.

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In a single atom, write down the maximum possible number of electrons a. with n = 3 b. with the designation 4d_xy c. with n = 5, l = 3, m_s = +

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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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E

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a. 1s²2s²2p⁶3s² b. 1s²2s²2p⁶3s²3p⁶4s²3d³ c. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p²

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Which of the following sets of elements have the [noble gas]ns²np² valence electron configuration?

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A