Question 1

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.F) B) and D)
G) A) and E)

Question 2

Select the paramagnetic ion.

Accepted Answer

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

Question 3

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

Question 4

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

Accepted Answer

A)  Li
B)  B
C)  O
D)  F
E)  NaF) A) and D)
G) A) and C)

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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 B)
G) A) and E)

Question 7

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) A) and D)
G) B) and C)

Question 8

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)  15F) A) and D)
G) C) and E) C

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

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,...

Question 11

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]1p1F) A) and E)
G) A) and D)

Question 12

Which of the following elements has the smallest atomic size?

Accepted Answer

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

Question 13

Select the element with the greatest metallic character.

Accepted Answer

A)  Li
B)  Ca
C)  Al
D)  Pb
E)  CsF) A) and B)
G) All of the above

Question 14

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.F) A) and B)
G) B) and D)

Question 15

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 16

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 17

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 18

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

Accepted Answer

A)  Rb
B)  Mg
C)  I
D)  As
E)  FF) C) and D)
G) A) and D)

Question 19

"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.F) A) and C)
G) B) and E)

Question 20

Which of the following atoms will be diamagnetic?

Accepted Answer

A)  Cr
B)  Ru
C)  Fe
D)  Pt
E)  CdF) B) and D)
G) A) and B) E

Exam 8: Electron Configuration and Chemical Periodicity

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

Correct AnswerverifiedShow Answer

Select the paramagnetic ion.

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedAmong the main group elements,...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following elements has the smallest atomic size?

Correct AnswerverifiedShow Answer

Select the element with the greatest metallic character.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct Answerverifieda.32 b.10 c.2

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.1s22s22p63s...View AnswerShow Answer

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

Correct AnswerverifiedIonization energies generally ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following atoms will be diamagnetic?

Correct AnswerverifiedE

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

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

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

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

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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.

Correct Answer
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a.32 b.10 c.2

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a.1s²2s²2p⁶3s...
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Ionization energies generally ...
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