Question 1

Which of the following atoms will be diamagnetic?

Accepted Answer

A) Cr 
B) Ru 
C) Fe 
D) Pt 
E) Cd 
A) Cr 
B) Ru 
C) Fe 
D) Pt 
E) Cd E

Question 2

Write down the maximum number of electrons in an atom which can have
a.quantum number n = 4.
b.orbital designation 3d.
c.orbital designation 2pz.

Accepted Answer

a.32
b.10
c.2

Question 3

An element with the electron configuration [noble gas]ns2(n - 1)d10np3 has ____________ valence electrons.

Accepted Answer

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

Question 4

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

Question 5

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 6

Consider the set of isoelectronic atoms and ions A2-,B-,C,D+,and E2+.Which arrangement of relative radii is correct?

Accepted Answer

A) A2- > B- > C > D+ > E2+ 
B) E2+ > D+ > C > B- > A2- 
C) A2- > B- > C + 2+ 
D) A2- -  D+ > E2+ 
E) None of these is correct. 
A) A2- > B- > C > D+ > E2+ 
B) E2+ > D+ > C > B- > A2- 
C) A2- > B- > C + 2+ 
D) A2- -  D+ > E2+ 
E) None of these is correct.

Question 7

Describe how the ionization energies of main group elements vary across a period in the periodic table,using a diagram if necessary.

Accepted Answer

Ionization energies generally

Question 8

Which of the following electron configuration 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 9

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 10

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

Accepted Answer

A) Rb 
B) Mg 
C) I 
D) As 
E) F 
A) Rb 
B) Mg 
C) I 
D) As 
E) F

Question 11

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.1s²2s²2p⁶3s

Question 12

Which of the following elements has the largest second ionization energy (IE2)?

Accepted Answer

A) Li 
B) B 
C) O 
D) F 
E) Na 
A) Li 
B) B 
C) O 
D) F 
E) Na

Question 13

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 14

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

Accepted Answer

A) True 
 B)False

Question 15

Which of the following elements has the smallest atomic size?

Accepted Answer

A) Na 
B) Ar 
C) K 
D) Ca 
E) Kr 
A) Na 
B) Ar 
C) K 
D) Ca 
E) Kr

Question 16

"Each electron in an atom must have its own unique set of quantum numbers" is a statement of

Accepted Answer

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

Question 17

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 18

An element with the electron configuration [noble gas]ns2(n - 1)d8 has ___________ valence electrons.

Accepted Answer

A) 2 
B) 6 
C) 8 
D) 10 
E) None of these choices is correct. 
A) 2 
B) 6 
C) 8 
D) 10 
E) None of these choices is correct.

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

With the aid of a diagram,describe how the atomic radii of main group elements vary with position in the periodic table.

Accepted Answer

Among the main group elements,

Exam 8: Electron Configuration and Chemical Periodicity

Which of the following atoms will be diamagnetic?

Write down the maximum number of electrons in an atom which can have a.quantum number n = 4. b.orbital designation 3d. c.orbital designation 2pz.

An element with the electron configuration [noble gas]ns2(n - 1)d10np3 has ____________ valence electrons.

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

Select the paramagnetic ion.

Consider the set of isoelectronic atoms and ions A2-,B-,C,D+,and E2+.Which arrangement of relative radii is correct?

Describe how the ionization energies of main group elements vary across a period in the periodic table,using a diagram if necessary.

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

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

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

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 elements has the largest second ionization energy (IE2)?

Select the element with the greatest metallic character.

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

Which of the following elements has the smallest atomic size?

"Each electron in an atom must have its own unique set of quantum numbers" is a statement of

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. )

An element with the electron configuration [noble gas]ns2(n - 1)d8 has ___________ valence electrons.

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

With the aid of a diagram,describe how the atomic radii of main group elements vary with position in the periodic table.

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three 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 Solutions

The Main-Group Elements: Applying Principles of Bonding and Structure

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 Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Write down the maximum number of electrons in an atom which can have a.quantum number n = 4. b.orbital designation 3d. c.orbital designation 2p_z.

An element with the electron configuration [noble gas]ns²(n - 1)d¹⁰np³ has ____________ valence electrons.

Consider the set of isoelectronic atoms and ions A^2-,B^-,C,D⁺,and E²⁺.Which arrangement of relative radii is correct?

Which of the following elements has the largest second ionization energy (IE₂)?

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. )

An element with the electron configuration [noble gas]ns²(n - 1)d⁸ has ___________ valence electrons.

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