Question 1

Select the diamagnetic ion.

Accepted Answer

A)  Cu2+ 
B)  Ni2+ 
C)  Cr3+ 
D)  Sc3+ 
E)  Cr2+ 
A)  Cu2+ 
B)  Ni2+ 
C)  Cr3+ 
D)  Sc3+ 
E)  Cr2+

Question 2

Which of the following sublevels is filled last? 3d, 4s, 4p, 4d, 5s

Accepted Answer

A)  3d 
B)  4s 
C)  4p 
D)  4d 
E)  5s 
A)  3d 
B)  4s 
C)  4p 
D)  4d 
E)  5s

Question 3

Write down the full electron configuration for ground state atoms of
a. S (element 16).
b. Pd (element 46).

Accepted Answer

a. 1s²2s²2p⁶3

Question 4

Which of the following electron configurations represents the ground state of an element?

Accepted Answer

A)  [Ne]3s13p1 
B)  [He]2s12p3 
C)  [Ne]3s23p23d1 
D)  [Ne]3s23p33d1 
E)  [Ne]3s23p3 
A)  [Ne]3s13p1 
B)  [He]2s12p3 
C)  [Ne]3s23p23d1 
D)  [Ne]3s23p33d1 
E)  [Ne]3s23p3

Question 5

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 6

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. 
A)  shielding. 
B)  penetration. 
C)  paramagnetism. 
D)  electron-pair repulsion. 
E)  relativity.

Question 7

The maximum number of electrons in an atom with the same value of n is 2n2.

Accepted Answer

A) True 
 B)False

Question 8

Select the element with the greatest metallic character.

Accepted Answer

A)  Li 
B)  Ca 
C)  Al 
D)  Pb 
E)  Cs 
A)  Li 
B)  Ca 
C)  Al 
D)  Pb 
E)  Cs

Question 9

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

Accepted Answer

A)  [He]2s22p5 
B)  [Ne]3s23p1 
C)  [Ar]4s14p1 
D)  [Kr]5s24d7 
E)  [He]1p1 
A)  [He]2s22p5 
B)  [Ne]3s23p1 
C)  [Ar]4s14p1 
D)  [Kr]5s24d7 
E)  [He]1p1

Question 10

Which of the following elements will form a cation with a +2 charge?

Accepted Answer

A)  Si 
B)  Sr 
C)  Ga 
D)  Cs 
E)  S 
A)  Si 
B)  Sr 
C)  Ga 
D)  Cs 
E)  S

Question 11

Which of the following ions will be most likely to form when selenium ionizes?

Accepted Answer

A)  Se6+ 
B)  Se4+ 
C)  Se2+ 
D)  Se2- 
E)  Se4- 
A)  Se6+ 
B)  Se4+ 
C)  Se2+ 
D)  Se2- 
E)  Se4-

Question 12

Which one of the following equations correctly represents the process relating to the ionization energy of X?

Accepted Answer

A)  X(s) F1F1F1S1F1F1F10 X+(g) + e- 
B)  X2(g) F1F1F1S1F1F1F10 X+(g) + X-(g) 
C)  X(g) + e- F1F1F1S1F1F1F10 X-(g) 
D)  X-(g) F1F1F1S1F1F1F10 X(g) + e- 
E)  X(g) F1F1F1S1F1F1F10 X+(g) + e- 
A)  X(s) F1F1F1S1F1F1F10 X+(g) + e- 
B)  X2(g) F1F1F1S1F1F1F10 X+(g) + X-(g) 
C)  X(g) + e- F1F1F1S1F1F1F10 X-(g) 
D)  X-(g) F1F1F1S1F1F1F10 X(g) + e- 
E)  X(g) F1F1F1S1F1F1F10 X+(g) + e-

Question 13

Metallic behavior is generally associated with

Accepted Answer

A)  elements with very negative electron affinities. 
B)  elements with low ionization energies. 
C)  elements with small atomic radii. 
D)  elements with unpaired electrons. 
E)  elements with partially filled p orbitals. 
A)  elements with very negative electron affinities. 
B)  elements with low ionization energies. 
C)  elements with small atomic radii. 
D)  elements with unpaired electrons. 
E)  elements with partially filled p orbitals.

Question 14

Elements with ________________ first ionization energies and ___________ electron affinities generally form cations.

Accepted Answer

A)  low, very negative 
B)  high, positive or slightly negative 
C)  low, positive or slightly negative 
D)  high, very negative 
E)  None of the above is generally correct. 
A)  low, very negative 
B)  high, positive or slightly negative 
C)  low, positive or slightly negative 
D)  high, very negative 
E)  None of the above is generally correct.

Question 15

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

Accepted Answer

A)  1s21p62s22p6 
B)  1s22s22p83s23p4 
C)  1s22s22p83s23p2 
D)  1s22s22p63s23p4 
E)  1s22s22p63s23d4 
A)  1s21p62s22p6 
B)  1s22s22p83s23p4 
C)  1s22s22p83s23p2 
D)  1s22s22p63s23p4 
E)  1s22s22p63s23d4

Question 16

Which of the following electron configurations is not possible for an atom in an excited state?

Accepted Answer

A)  1s22s22p63s23p63d104s14p1 
B)  1s22s22p63s13p5 
C)  1s22s22p63s23p23d2 
D)  1s22s22p63s23p63d104s2 
E)  1s22s22p63s23p63d104s14p3 
A)  1s22s22p63s23p63d104s14p1 
B)  1s22s22p63s13p5 
C)  1s22s22p63s23p23d2 
D)  1s22s22p63s23p63d104s2 
E)  1s22s22p63s23p63d104s14p3

Question 17

Select the correct set of quantum numbers (n, l, ml, ms) for the highest energy electron in the ground state of tin, Sn.

Accepted Answer

A)  5, 2, -1,   
B)  5, 2, 0,   
C)  5, 1, 2,   
D)  5, 1, 0,   
E)  5, 2, 1,   
A)  5, 2, -1,   
B)  5, 2, 0,   
C)  5, 1, 2,   
D)  5, 1, 0,   
E)  5, 2, 1,

Question 18

Select the most acidic compound from the following:

Accepted Answer

A)  SO2 
B)  Al2O3 
C)  CaO 
D)  PbO 
E)  H2O 
A)  SO2 
B)  Al2O3 
C)  CaO 
D)  PbO 
E)  H2O

Question 19

Which of the following elements has the smallest atomic radius?

Accepted Answer

A)  Li 
B)  Ne 
C)  Rb 
D)  Sr 
E)  Xe 
A)  Li 
B)  Ne 
C)  Rb 
D)  Sr 
E)  Xe

Question 20

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)  15 
A)  2 
B)  3 
C)  5 
D)  10 
E)  15

Exam 8: Electron Configuration and Chemical Periodicity

Select the diamagnetic ion.

Which of the following sublevels is filled last? 3d, 4s, 4p, 4d, 5s

Write down the full electron configuration for ground state atoms of a. S (element 16). b. Pd (element 46).

Which of the following electron configurations represents the ground state of an element?

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

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

The maximum number of electrons in an atom with the same value of n is 2n2.

Select the element with the greatest metallic character.

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

Which of the following elements will form a cation with a +2 charge?

Which of the following ions will be most likely to form when selenium ionizes?

Which one of the following equations correctly represents the process relating to the ionization energy of X?

Metallic behavior is generally associated with

Elements with ________________ first ionization energies and ___________ electron affinities generally form cations.

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

Which of the following electron configurations is not possible for an atom in an excited state?

Select the correct set of quantum numbers (n, l, ml, ms) for the highest energy electron in the ground state of tin, Sn.

Select the most acidic compound from the following:

Which of the following elements has the smallest atomic radius?

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

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

The maximum number of electrons in an atom with the same value of n is 2n².

Elements with ______ first ionization energies and _ electron affinities generally form cations.

Select the correct set of quantum numbers (n, l, m_l, m_s) for the highest energy electron in the ground state of tin, Sn.

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