Question 1

Place the following in order of increasing metallic character.
Br Cs Se

Accepted Answer

A) Br < Se < Cs 
B) Se < Br < Cs 
C) Cs < Br < Se 
D) Cs < Se < Br 
E) Br < Cs < Se 
A) Br < Se < Cs 
B) Se < Br < Cs 
C) Cs < Br < Se 
D) Cs < Se < Br 
E) Br < Cs < Se

Question 2

Below is a list of successive ionization energies (in kJ/mol)for a period 3 element.Identify the element and explain how you came to that conclusion.
IE2 = 2250 IE3 = 3360 IE4= 4560 IE5= 7010 IE6= 8500 IE7 = 27,100

Accepted Answer

The large increase in ionizati

Question 3

How many of the following species are paramagnetic?
Sc3+ Br⁻ Mg2+ Se

Accepted Answer

A) 0 
B) 2 
C) 1 
D) 4 
E) 3 
A) 0 
B) 2 
C) 1 
D) 4 
E) 3

Question 4

Identify the number of valence electrons for Mg.

Accepted Answer

A) 8 
B) 7 
C) 5 
D) 2 
A) 8 
B) 7 
C) 5 
D) 2

Question 5

Why do successive ionization energies increase?

Accepted Answer

After removing the first electron,the sp

Question 6

Which element has the ground-state electron configuration [Xe]6s2 4 f 7?

Accepted Answer

A) Re 
B) Ir 
C) Eu 
D) Gd 
A) Re 
B) Ir 
C) Eu 
D) Gd

Question 7

Give the electronic configuration for Fe.

Accepted Answer

A) 1s2 2s2 2p6 3s2 3p6 4s2 4d6 
B) 1s2 2s2 2p6 3s2 3p6 4s1 3d6 
C) 1s2 2s2 2p6 3s2 3p6 4s 2 3d6 
D) 1s2 2s2 2p6 3s2 3p6 4s2 4p6 
A) 1s2 2s2 2p6 3s2 3p6 4s2 4d6 
B) 1s2 2s2 2p6 3s2 3p6 4s1 3d6 
C) 1s2 2s2 2p6 3s2 3p6 4s 2 3d6 
D) 1s2 2s2 2p6 3s2 3p6 4s2 4p6

Question 8

Give the set of four quantum numbers that could represent the electron lost to form the K+ ion from the K atom.

Accepted Answer

A) n = 3,l = 1,ml = 1,ms = -   
B) n = 4,l = 1,ml = 1,ms = +   
C) n = 4,l = 4,ml = 0,ms = -   
D) n = 4,l = 0,ml = 0,ms = +   
E) n = 3,l = 0,ml = 1,ms = +   
A) n = 3,l = 1,ml = 1,ms = -   
B) n = 4,l = 1,ml = 1,ms = +   
C) n = 4,l = 4,ml = 0,ms = -   
D) n = 4,l = 0,ml = 0,ms = +   
E) n = 3,l = 0,ml = 1,ms = +

Question 9

Of the following,which atom has the smallest atomic radius?

Accepted Answer

A) K 
B) As 
C) Rb 
D) Sb 
A) K 
B) As 
C) Rb 
D) Sb

Question 10

Write out the orbital diagram that represents the ground state of As.How many unpaired electrons are there?

Accepted Answer

A) 0 
B) 4 
C) 3 
D) 2 
E) 1 
A) 0 
B) 4 
C) 3 
D) 2 
E) 1

Question 11

How many valence shell electrons does an atom of indium have?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 49 
A) 1 
B) 2 
C) 3 
D) 49

Question 12

Give the ground state electron configuration for Cd.

Accepted Answer

A) [Kr] 5s2 5d10 
B) [Kr] 5s2 4d10 5p2 
C) [Kr] 4d10 
D) [Kr] 5s2 4d8 
E) [Kr] 5s2 4d10 
A) [Kr] 5s2 5d10 
B) [Kr] 5s2 4d10 5p2 
C) [Kr] 4d10 
D) [Kr] 5s2 4d8 
E) [Kr] 5s2 4d10

Question 13

Choose the diamagnetic species from below.

Accepted Answer

A) Sn2⁺ 
B) Br 
C) P 
D) Cr 
E) None of the above are diamagnetic. 
A) Sn2⁺ 
B) Br 
C) P 
D) Cr 
E) None of the above are diamagnetic.

Question 14

What period 3 element has the following ionization energies (all in kJ/mol)?
IE1 = 1012 IE2 = 1900 IE3= 2910 IE4= 4960 IE5= 6270 IE6 = 22,200

Accepted Answer

A) Si 
B) S 
C) P 
D) Cl 
E) Mg 
A) Si 
B) S 
C) P 
D) Cl 
E) Mg

Question 15

Refer to the figure.Place the following in order of decreasing IE1.
Cs Mg Ar

Accepted Answer

A) Cs > Mg > Ar 
B) Mg > Ar > Cs 
C) Ar > Mg > Cs 
D) Cs > Ar > Mg 
E) Mg > Cs > Ar 
A) Cs > Mg > Ar 
B) Mg > Ar > Cs 
C) Ar > Mg > Cs 
D) Cs > Ar > Mg 
E) Mg > Cs > Ar

Question 16

Give the ground state electron configuration for Mg2+.

Accepted Answer

A) 1s2 2s2 2p6 3s2 
B) 1s2 2s2 2p6 
C) 1s2 2s2 2p6 3s2 3p2 
D) 1s2 2s2 2p6 3s2 3p6 
E) 1s2 2s2 2p6 3s1 
A) 1s2 2s2 2p6 3s2 
B) 1s2 2s2 2p6 
C) 1s2 2s2 2p6 3s2 3p2 
D) 1s2 2s2 2p6 3s2 3p6 
E) 1s2 2s2 2p6 3s1

Question 17

Which reaction below represents the second ionization of Sr?

Accepted Answer

A) Sr(g)→ Sr⁺(g)+ e⁻ 
B) Sr2⁺(g)+ e⁻ → Sr⁺(g) 
C) Sr⁺(g)+ e⁻ → Sr(g) 
D) Sr⁻(g)+ e⁻ → Sr2⁻(g) 
E) Sr⁺(g)→ Sr2⁺(g)+ e⁻ 
A) Sr(g)→ Sr⁺(g)+ e⁻ 
B) Sr2⁺(g)+ e⁻ → Sr⁺(g) 
C) Sr⁺(g)+ e⁻ → Sr(g) 
D) Sr⁻(g)+ e⁻ → Sr2⁻(g) 
E) Sr⁺(g)→ Sr2⁺(g)+ e⁻

Question 18

Of the following,which element has the highest first ionization energy?

Accepted Answer

A) Al 
B) Cl 
C) Na 
D) P 
A) Al 
B) Cl 
C) Na 
D) P

Question 19

Which of the following have their valence electrons in the same shell?

Accepted Answer

A) Li,N,F 
B) B,Si,As 
C) N,As,Bi 
D) He,Ne,F 
A) Li,N,F 
B) B,Si,As 
C) N,As,Bi 
D) He,Ne,F

Question 20

Give the set of four quantum numbers that could represent the last electron added (using the Aufbau principle)to the Sr atom.

Accepted Answer

A) n = 5,l = 0,ml = 0,ms = -   
B) n = 4,l = 1,ml = 1,ms = -   
C) n = 5,l = 1,ml = 0,ms = +   
D) n = 4,l = 1,ml = -1,ms = +   
E) n = 5,l = 1,ml =1 ,ms = -   
A) n = 5,l = 0,ml = 0,ms = -   
B) n = 4,l = 1,ml = 1,ms = -   
C) n = 5,l = 1,ml = 0,ms = +   
D) n = 4,l = 1,ml = -1,ms = +   
E) n = 5,l = 1,ml =1 ,ms = -

Place the following in order of increasing metallic character. Br Cs Se

Below is a list of successive ionization energies (in kJ/mol)for a period 3 element.Identify the element and explain how you came to that conclusion. IE₂ = 2250 IE₃ = 3360 IE₄= 4560 IE₅= 7010 IE₆= 8500 IE₇= 27,100

How many of the following species are paramagnetic? Sc³⁺ Br^⁻ Mg²⁺ Se

Identify the number of valence electrons for Mg.

Why do successive ionization energies increase?

Which element has the ground-state electron configuration [Xe]6s²4 f ⁷?

Give the electronic configuration for Fe.

Give the set of four quantum numbers that could represent the electron lost to form the K⁺ ion from the K atom.

Of the following,which atom has the smallest atomic radius?

Write out the orbital diagram that represents the ground state of As.How many unpaired electrons are there?

How many valence shell electrons does an atom of indium have?

Give the ground state electron configuration for Cd.

Choose the diamagnetic species from below.

What period 3 element has the following ionization energies (all in kJ/mol)? IE₁ = 1012 IE₂ = 1900 IE₃= 2910 IE₄= 4960 IE₅= 6270 IE₆= 22,200

Refer to the figure.Place the following in order of decreasing IE₁. Cs Mg Ar

Give the ground state electron configuration for Mg²⁺.

Which reaction below represents the second ionization of Sr?

Of the following,which element has the highest first ionization energy?

Which of the following have their valence electrons in the same shell?

Give the set of four quantum numbers that could represent the last electron added (using the Aufbau principle)to the Sr atom.

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Exam 8: Periodic Properties of the Elements

Place the following in order of increasing metallic character. Br Cs Se

Below is a list of successive ionization energies (in kJ/mol)for a period 3 element.Identify the element and explain how you came to that conclusion. IE2 = 2250 IE3 = 3360 IE4= 4560 IE5= 7010 IE6= 8500 IE7 = 27,100

How many of the following species are paramagnetic? Sc3+ Br⁻ Mg2+ Se

Identify the number of valence electrons for Mg.

Why do successive ionization energies increase?

Which element has the ground-state electron configuration [Xe]6s2 4 f 7?

Give the electronic configuration for Fe.

Give the set of four quantum numbers that could represent the electron lost to form the K+ ion from the K atom.

Of the following,which atom has the smallest atomic radius?

Write out the orbital diagram that represents the ground state of As.How many unpaired electrons are there?

How many valence shell electrons does an atom of indium have?

Give the ground state electron configuration for Cd.

Choose the diamagnetic species from below.

What period 3 element has the following ionization energies (all in kJ/mol)? IE1 = 1012 IE2 = 1900 IE3= 2910 IE4= 4960 IE5= 6270 IE6 = 22,200

Refer to the figure.Place the following in order of decreasing IE1. Cs Mg Ar

Give the ground state electron configuration for Mg2+.

Which reaction below represents the second ionization of Sr?

Of the following,which element has the highest first ionization energy?

Which of the following have their valence electrons in the same shell?

Give the set of four quantum numbers that could represent the last electron added (using the Aufbau principle)to the Sr atom.

Matter, Measurement, and Problem Solving

Atoms and Elements

Molecules, Compounds and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

Below is a list of successive ionization energies (in kJ/mol)for a period 3 element.Identify the element and explain how you came to that conclusion. IE₂ = 2250 IE₃ = 3360 IE₄= 4560 IE₅= 7010 IE₆= 8500 IE₇= 27,100

How many of the following species are paramagnetic? Sc³⁺ Br^⁻ Mg²⁺ Se

Which element has the ground-state electron configuration [Xe]6s²4 f ⁷?

Give the set of four quantum numbers that could represent the electron lost to form the K⁺ ion from the K atom.

What period 3 element has the following ionization energies (all in kJ/mol)? IE₁ = 1012 IE₂ = 1900 IE₃= 2910 IE₄= 4960 IE₅= 6270 IE₆= 22,200

Refer to the figure.Place the following in order of decreasing IE₁. Cs Mg Ar

Give the ground state electron configuration for Mg²⁺.