Question 1

Which element has the lowest first ionization energy?

Accepted Answer

A)  Be 
B)  Br 
C)  N 
D)  S 
E)  Ca 
A)  Be 
B)  Br 
C)  N 
D)  S 
E)  Ca

Question 2

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. 
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.

Question 3

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

Question 4

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< Br 
A)  Br <Xe < Rb 
B)  Xe< Br < Rb 
C)  Br< Rb< Xe 
D)  Rb< Xe < Br 
E)  Xe < Rb< Br

Question 5

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. 
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.

Question 6

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

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 7

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. 
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.

Question 8

Zinc is categorized as a/an ________.

Accepted Answer

A)  alkali metal 
B)  alkaline earth metal 
C)  transition metal 
D)  halogen 
E)  nobel gas 
A)  alkali metal 
B)  alkaline earth metal 
C)  transition metal 
D)  halogen 
E)  nobel gas

Question 9

Identify the number of valence electrons in Cl-.

Accepted Answer

A)  6 
B)  7 
C)  8 
D)  5 
E)  4 
A)  6 
B)  7 
C)  8 
D)  5 
E)  4

Question 10

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. 
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.

Question 11

Identify the alkali metal that is most reactive with water.

Accepted Answer

A)  Cs 
B)  Rb 
C)  K 
D)  Na 
E)  Li 
A)  Cs 
B)  Rb 
C)  K 
D)  Na 
E)  Li

Question 12

Predict the charge of the most stable ion of chlorine.

Accepted Answer

A)  2+ 
B)  1+ 
C)  3+ 
D)  1- 
E)  2- 
A)  2+ 
B)  1+ 
C)  3+ 
D)  1- 
E)  2-

Question 13

Give the number of electrons in Na+1.

Accepted Answer

A)  10 
B)  13 
C)  9 
D)  11 
E)  12 
A)  10 
B)  13 
C)  9 
D)  11 
E)  12

Question 14

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) 
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)

Question 15

Which element is diamagnetic?

Accepted Answer

A)  Li 
B)  F 
C)  Rb 
D)  V 
E)  Zn 
A)  Li 
B)  F 
C)  Rb 
D)  V 
E)  Zn

Question 16

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 > P 
A)  P > As > K 
B)  As > P > K 
C)  K > P > As 
D)  As > K > P 
E)  K > As > P

Question 17

Which element has the chemical symbol,Rn?

Accepted Answer

A)  radium 
B)  radon 
C)  rhenium 
D)  rhodium 
A)  radium 
B)  radon 
C)  rhenium 
D)  rhodium

Question 18

What is the chemical symbol for chlorine?

Accepted Answer

A)  C 
B)  Ce 
C)  Cl 
D)  Co 
A)  C 
B)  Ce 
C)  Cl 
D)  Co

Question 19

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

Accepted Answer

A)  chlorine 
B)  bromine 
C)  iodine 
D)  fluorine 
A)  chlorine 
B)  bromine 
C)  iodine 
D)  fluorine

Question 20

How many electrons are in the ion,Zn2+?

Accepted Answer

A)  28 
B)  30 
C)  32 
D)  65 
A)  28 
B)  30 
C)  32 
D)  65

Exam 4: Periodic Properties of the Elements

Which element has the lowest first ionization energy?

According to Hund's Rule

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

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

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

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

Identify an anion.

Zinc is categorized as a/an ________.

Identify the number of valence electrons in Cl-.

The Pauli Exclusion Principle states that

Identify the alkali metal that is most reactive with water.

Predict the charge of the most stable ion of chlorine.

Give the number of electrons in Na+1.

Which reaction below represents the electron affinity of Li?

Which element is diamagnetic?

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

Which element has the chemical symbol,Rn?

What is the chemical symbol for chlorine?

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

How many electrons are in the ion,Zn2+?

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

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

Identify the number of valence electrons in Cl^-.

Give the number of electrons in Na⁺¹.

How many electrons are in the ion,Zn²⁺?