Question 1

Give the number of electrons in Na+1.

Accepted Answer

A)   10
B)   13
C)   9
D)   11
E)   12F) A) and B)
G) D) and E)

Question 2

Choose the valence orbital diagram that represents the ground state of Sr2⁺.

Accepted Answer

A)   2⁺. 
A)     
B)     
C)     
D)     
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B)   2⁺. 
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D)     
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C)   2⁺. 
A)     
B)     
C)     
D)     
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D)   2⁺. 
A)     
B)     
C)     
D)     
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E)   2⁺. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) B) and C)
G) A) and E)

Question 3

Place the following in order of decreasing metallic character. P As K

Accepted Answer

A)   P > As > K
B)   As > P > K
C)   K > P > As
D)   As > K > P
E)   K > As > PF) B) and D)
G) B) and E)

Question 4

Which element is diamagnetic?

Accepted Answer

A)   Li
B)   F
C)   Rb
D)   V
E)   ZnF) All of the above
G) A) and B)

Question 5

In which of the following sets do all species have the same number of electrons?

Accepted Answer

A)   Cl-, Ar, Ca2+
B)   N, O2-, F-
C)   Sc3+, Y3+, La3+
D)   Cr, Cr2+, Cr3+E) A) and B)
F) C) and D)

Question 6

The Pauli Exclusion Principle states that

Accepted Answer

A)   s orbitals are always lower in energy than p orbitals.
B)   electrons spin around the nucleus.
C)   you can never know the precise position and energy of an electron.
D)   The potential energy of two charges particles depends on their distance.
E)   no two electrons in the same atom can have the same four quantum numbers.F) B) and E)
G) B) and D)

Question 7

Which element has the chemical symbol,Rn?

Accepted Answer

A)   radium
B)   radon
C)   rhenium
D)   rhodiumE) C) and D)
F) A) and C)

Question 8

Place the following elements in order of increasing atomic radius. Xe Rb Br

Accepted Answer

A)   Br <Xe < Rb
B)   Xe< Br < Rb
C)   Br< Rb< Xe
D)   Rb< Xe < Br
E)   Xe < Rb< BrF) C) and E)
G) A) and B)

Question 9

Why does an electron found in a 2s orbital have a lower energy than an electron found in a 2p orbital in multielectron systems?

Accepted Answer

A)   Electrons in the 2s orbital are shielded by electrons in the 2p.
B)   There are more nodes found in the 2s orbital.
C)   Electrons in the 2s orbital can penetrate the 1s orbital and be closer to the nucleus.
D)   The larger number of electrons found in the 2p orbital leads to greater repulsion.
E)   The shape of the orbital ultimately determines the energy of the electrons.F) C) and D)
G) C) and E)

Question 10

How many electrons are in the ion,Zn2+?

Accepted Answer

A)   28
B)   30
C)   32
D)   65E) None of the above
F) B) and C)

Question 11

Predict the charge of the most stable ion of chlorine.

Accepted Answer

A)   2+
B)   1+
C)   3+
D)   1-
E)   2-F) A) and D)
G) A) and E)

Question 12

According to Hund's Rule

Accepted Answer

A)   electrons pair off first, then fill orbitals.
B)   electrons fill orbitals of the same energy singly and pair up only after the orbitals are all half filled.
C)   orbitals of the same energy level have the same energy.
D)   no two electrons in the same atom can have the same four quantum numbers.
E)   electrons found in the same orbital must have the same spin.F) B) and D)
G) B) and C)

Question 13

Identify the alkali metal that is most reactive with water.

Accepted Answer

A)   Cs
B)   Rb
C)   K
D)   Na
E)   LiF) C) and D)
G) C) and E)

Question 14

Zinc is categorized as a/an ________.

Accepted Answer

A)   alkali metal
B)   alkaline earth metal
C)   transition metal
D)   halogen
E)   nobel gasF) B) and E)
G) C) and D)

Question 15

What is the chemical symbol for chlorine?

Accepted Answer

A)   C
B)   Ce
C)   Cl
D)   CoE) C) and D)
F) B) and D)

Question 16

Identify the number of valence electrons in Cl-.

Accepted Answer

A)   6
B)   7
C)   8
D)   5
E)   4F) A) and B)
G) A) and C)

Question 17

Identify an anion.

Accepted Answer

A)   an atom that has lost an electron
B)   an atom that has gained an electron
C)   an atom that has lost a neutron and a proton.
D)   an atom that has gained a neutron and a proton.E) B) and D)
F) A) and C)

Question 18

Which element has the lowest first ionization energy?

Accepted Answer

A)   Be
B)   Br
C)   N
D)   S
E)   CaF) A) and C)
G) C) and E)

Question 19

Which reaction below represents the electron affinity of Li?

Accepted Answer

A)   Li(g)  + e⁻ → Li⁻(g) 
B)   Li(g)  → Li⁺(g)  + e⁻
C)   Li(g)  + e⁻ → Li⁺(g) 
D)   Li⁺(g)  → Li(g)  + e⁻
E)   Li⁺(g)  + e⁻ → Li(g) F) A) and B)
G) B) and E)

Question 20

Identify the green-yellowish gas that is used as a disinfecting agent.

Accepted Answer

A)   chlorine
B)   bromine
C)   iodine
D)   fluorineE) C) and D)
F) A) and B)

Exam 4: Periodic Properties of the Elements

Place the following elements in order of increasing atomic radius. Xe Rb Br

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Which reaction below represents the electron affinity of Li?

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Identify the number of valence electrons in Cl-.

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According to Hund's Rule

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How many electrons are in the ion,Zn2+?

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Zinc is categorized as a/an ________.

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Which element has the lowest first ionization energy?

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Place the following in order of decreasing metallic character. P As K

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In which of the following sets do all species have the same number of electrons?

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Give the number of electrons in Na+1.

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Which element has the chemical symbol,Rn?

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The Pauli Exclusion Principle states that

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Predict the charge of the most stable ion of chlorine.

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Identify the green-yellowish gas that is used as a disinfecting agent.

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Why does an electron found in a 2s orbital have a lower energy than an electron found in a 2p orbital in multielectron systems?

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What is the chemical symbol for chlorine?

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Choose the valence orbital diagram that represents the ground state of Sr2⁺.

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Identify the alkali metal that is most reactive with water.

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Identify an anion.

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Which element is diamagnetic?

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Identify the number of valence electrons in Cl^-.

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How many electrons are in the ion,Zn²⁺?

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Give the number of electrons in Na⁺¹.

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Choose the valence orbital diagram that represents the ground state of Sr²^⁺.

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