Question 1

Which ion is isoelectronic with Ar?

Accepted Answer

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

Question 2

Which of these atoms has the smallest radius?

Accepted Answer

A)   Al
B)   P
C)   As
D)   Te
E)   NaF) A) and E)
G) A) and D)

Question 3

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

Accepted Answer

A)   2
B)   4
C)   14
D)   36
E)   50F) A) and C)
G) A) and D)

Question 4

Which of these elements has the smallest first ionization energy?

Accepted Answer

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

Question 5

Which of the following elements has the largest atomic size?

Accepted Answer

A)   S
B)   Ca
C)   Ba
D)   Po
E)   RnF) A) and D)
G) C) and E)

Question 6

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

Question 7

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 D)
G) B) and E)

Question 8

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

Question 9

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

Question 10

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

Question 11

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

Accepted Answer

Noble gase...

Question 12

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 B)
G) C) and E)

Question 13

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) C) and E)

Question 14

Which one of these elements is a transition element?

Accepted Answer

A)   Nickel
B)   Tin
C)   Sodium
D)   Sulfur
E)   CalciumF) A) and D)
G) C) and E)

Question 15

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 E)
G) A) and C)

Question 16

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

Question 17

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

Question 18

Which of these elements has the greatest metallic character?

Accepted Answer

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

Question 19

Which of these ground-state ions has unpaired electrons?

Accepted Answer

A)   P3-
B)   V5+
C)   Mg2+
D)   Sc2+
E)   S2-F) None of the above
G) A) and B)

Question 20

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 C)
G) A) and B)

Exam 7: Electron Configuration and the Periodic Table

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 one of these elements is a transition element?

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

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

Correct AnswerverifiedNoble gase...View AnswerShow Answer

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

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The electron affinity of oxygen is equal to

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

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The general electron configuration for atoms of the halogen group is

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Which of these atoms has the smallest radius?

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Which of the following elements has the largest atomic size?

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

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Which of these ground-state ions has unpaired electrons?

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Which ion is isoelectronic with Ar?

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

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Which of these elements has the greatest metallic character?

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

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

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Noble gase...
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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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