Question 1

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 right 
A)  lower left 
B)  upper left 
C)  center 
D)  lower right 
E)  upper right E

Question 2

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 3

Which of the following has the most negative electron affinity?

Accepted Answer

A)  H 
B)  Li 
C)  Na 
D)  K 
E)  Rb 
A)  H 
B)  Li 
C)  Na 
D)  K 
E)  Rb A

Question 4

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 5

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

Accepted Answer

A)  Na 
B)  Cl 
C)  Ca 
D)  Te 
E)  Br 
A)  Na 
B)  Cl 
C)  Ca 
D)  Te 
E)  Br

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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)  36 
A)  9 
B)  12 
C)  18 
D)  24 
E)  36

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

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. 
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.

Question 10

Select the paramagnetic ion.

Accepted Answer

A)  Cu+ 
B)  Ag+ 
C)  Fe3+ 
D)  Cd2+ 
E)  Ca2+ 
A)  Cu+ 
B)  Ag+ 
C)  Fe3+ 
D)  Cd2+ 
E)  Ca2+

Question 11

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, Hf 
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, Hf

Question 12

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]5s24d105p4 
A)  [Kr]5s25p64d8 
B)  [Kr]5s25d105p4 
C)  [Kr]5s24d105p6 
D)  [Kr]5s24f14 
E)  [Kr]5s24d105p4

Question 13

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

Question 14

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 left 
A)  upper right 
B)  upper left 
C)  center 
D)  lower right 
E)  lower left

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

Which of the following electron configurations is impossible?

Accepted Answer

A)  1s22s22p63s23p4 
B)  1s22s22p53s13p4 
C)  1s22s22p63s23p63d104s2 
D)  1s22s22p63s33p4 
E)  1s12s22p63s23p4 
A)  1s22s22p63s23p4 
B)  1s22s22p53s13p4 
C)  1s22s22p63s23p63d104s2 
D)  1s22s22p63s33p4 
E)  1s12s22p63s23p4

Question 17

Which of the following elements has the largest atomic size?

Accepted Answer

A)  S 
B)  Ca 
C)  Ba 
D)  Po 
E)  Rn 
A)  S 
B)  Ca 
C)  Ba 
D)  Po 
E)  Rn

Question 18

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 19

Which of the following elements is paramagnetic?

Accepted Answer

A)  Kr 
B)  Zn 
C)  Sr 
D)  V 
E)  Ar 
A)  Kr 
B)  Zn 
C)  Sr 
D)  V 
E)  Ar

Question 20

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

Exam 8: Electron Configuration and Chemical Periodicity

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

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

Which of the following has the most negative electron affinity?

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

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

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

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.)

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

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

Select the paramagnetic ion.

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

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

"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

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

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

Which of the following electron configurations is impossible?

Which of the following elements has the largest atomic size?

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.

Which of the following elements is paramagnetic?

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 = +

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

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.)

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

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

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 = +