Question 1

The electron affinity of oxygen is equal to

Accepted Answer

A)   the ionization energy of O-.
B)   the ionization energy of O2-.
C)   the second ionization energy of O.
D)   twice the electron affinity of O+.
E)   none of these.F) None of the above
G) A) and B)

Question 2

Which one of these elements is a transition element?

Accepted Answer

A)   Nickel
B)   Tin
C)   Sodium
D)   Sulfur
E)   CalciumF) C) and E)
G) All of the above

Question 3

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

Question 4

Anions of Group 7A elements are isoelectronic with what group?

Accepted Answer

Noble gase...

Question 5

Which of these ground-state ions has unpaired electrons?

Accepted Answer

A)   P3-
B)   V5+
C)   Mg2+
D)   Sc2+
E)   S2-F) B) and D)
G) B) and C)

Question 6

Which of these elements has the smallest first ionization energy?

Accepted Answer

A)   Cl
B)   Na
C)   Be
D)   K
E)   AsF) C) and E)
G) C) and D)

Question 7

Who found that the atomic number was equal to the number of protons in the nucleus and to the number of electrons outside the nucleus in a neutral atom?

Accepted Answer

A)   Meyer
B)   Newlands
C)   Moseley
D)   Mendeleev
E)   ThomsonF) C) and D)
G) A) and B)

Question 8

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

Question 9

Which of the following elements has the largest atomic size?

Accepted Answer

A)   S
B)   Ca
C)   Ba
D)   Po
E)   RnF) A) and B)
G) None of the above

Question 10

Which ion is isoelectronic with Ar?

Accepted Answer

A)   Fe2+
B)   F-
C)   Br-
D)   Ga3+
E)   Ca2+F) A) and D)
G) A) and C)

Question 11

Which of these atoms has the smallest radius?

Accepted Answer

A)   Al
B)   P
C)   As
D)   Te
E)   NaF) A) and B)
G) All of the above

Question 12

The general electron configuration for atoms of all elements in Group 5A is

Accepted Answer

A)   ns2np6.
B)   ns2np5.
C)   ns2np4.
D)   ns2np3.
E)   ns2np1.F) B) and D)
G) B) and C)

Question 13

Which one of the following equations correctly represents the process involved in the electron affinity of X?

Accepted Answer

A)   X(g)  → X+(g)  + e-
B)   X+(g)  → X+(aq) 
C)   X+(g)  + e- → X(g) 
D)   X(g)  + e- → X-(g) 
E)   X+(g)  + Y-(g)  → XY(s) F) C) and E)
G) D) and E)

Question 14

In what group of the periodic table is the element with the electron configuration [Ar]4s23d104p3?

Accepted Answer

A)   1A
B)   2A
C)   3A
D)   4A
E)   5AF) None of the above
G) A) and E)

Question 15

Which of these elements has the greatest metallic character?

Accepted Answer

A)   Br
B)   F
C)   Ge
D)   Mn
E)   ScF) A) and C)
G) A) and B)

Question 16

Which of these species make an isoelectronic pair: Cl-, O2-, F, Ca2+, Fe3+?

Accepted Answer

A)   Ca2+ and Fe3+
B)   O2- and F
C)   F and Cl- 
D)   Cl- and Ca2+
E)   None of the species are part of an isoelectronic series.F) A) and B)
G) All of the above

Question 17

The general electron configuration for atoms of the halogen group is

Accepted Answer

A)   ns2np6.
B)   ns2np5.
C)   ns2np6 (n - 1) d7.
D)   ns1.
E)   ns2np7.F) A) and D)
G) A) and C)

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.F) A) and C)
G) A) and D)

Question 19

Each of the noble gases has a completely filled p subshell except for which one?

Accepted Answer

A)   Xenon
B)   Neon
C)   Radon
D)   Argon
E)   HeliumF) A) and D)
G) D) and E)

Question 20

How many valence electrons does a tin (Sn)  atom have?

Accepted Answer

A)   2
B)   4
C)   14
D)   36
E)   50F) A) and E)
G) All of the above

Exam 7: Electron Configuration and the Periodic Table

How many valence electrons does a tin (Sn) atom have?

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Which of these ground-state ions has unpaired electrons?

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The electron affinity of oxygen is equal to

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

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In what group of the periodic table is the element with the electron configuration [Ar]4s23d104p3?

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Which one of these elements is a transition element?

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

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

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Which of these species make an isoelectronic pair: Cl-, O2-, F, Ca2+, Fe3+?

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Which of these elements has the smallest first ionization energy?

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The general electron configuration for atoms of all elements in Group 5A is

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Which ion is isoelectronic with Ar?

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Each of the noble gases has a completely filled p subshell except for which one?

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Which of these atoms has the smallest radius?

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Who found that the atomic number was equal to the number of protons in the nucleus and to the number of electrons outside the nucleus in a neutral atom?

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Which of these elements has the greatest metallic character?

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The general electron configuration for atoms of the halogen group is

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Which one of the following equations correctly represents the process involved in the electron affinity of X?

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Which of the following elements has the largest atomic size?

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Anions of Group 7A elements are isoelectronic with what group?

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In what group of the periodic table is the element with the electron configuration [Ar]4s²3d¹⁰4p³?

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

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Which of these species make an isoelectronic pair: Cl^-, O^2-, F, Ca²⁺, Fe³⁺?

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