Question 1

Which of the following statements is correct and provides the best explanation for what happens when the first two electrons are removed from calcium?

Accepted Answer

A)  Energy is released when either electron comes off since calcium is a metal and not very electronegative. 
B)  It takes less energy to remove the second electron from calcium as compared to the first because calcium wants to have eight electrons in its outer shell (and thus have a noble gas configuration). 
C)  It takes less energy to remove the first electron as compared to the second because it is in a higher energy level than the second electron. 
D)  It takes more energy to remove the second electron as compared to the first because the nucleus binds the electrons more tightly as each electron is removed. 
E)  Electrons cannot be removed from calcium since it is a metal and only wants to gain electrons to become more stable. 
A)  Energy is released when either electron comes off since calcium is a metal and not very electronegative. 
B)  It takes less energy to remove the second electron from calcium as compared to the first because calcium wants to have eight electrons in its outer shell (and thus have a noble gas configuration). 
C)  It takes less energy to remove the first electron as compared to the second because it is in a higher energy level than the second electron. 
D)  It takes more energy to remove the second electron as compared to the first because the nucleus binds the electrons more tightly as each electron is removed. 
E)  Electrons cannot be removed from calcium since it is a metal and only wants to gain electrons to become more stable. D

Question 2

What are the general trends in ionization energy
a. across a period?
b. down a group (family)?

Accepted Answer

a. increases
b. decreases

Question 3

The electron configuration for vanadium is

Accepted Answer

A)  [Ar] 4s23d3 
B)  1s22s22p63s23d2 
C)  [Ar] 4s24p3 
D)  1s22s22p63s13d4 
E)  [Ar] 3d5 
A)  [Ar] 4s23d3 
B)  1s22s22p63s23d2 
C)  [Ar] 4s24p3 
D)  1s22s22p63s13d4 
E)  [Ar] 3d5 A

Question 4

Which of the following has the electron configuration 1s22s22p63s23p64s23d5 ?

Accepted Answer

A)  Mn 
B)  Ca 
C)  Br 
D)  V 
E)  Fe 
A)  Mn 
B)  Ca 
C)  Br 
D)  V 
E)  Fe

Question 5

The element with the electron configuration [Kr] 5s24d105p4 is

Accepted Answer

A)  Te 
B)  Se 
C)  Mo 
D)  Nd 
E)  none of these 
A)  Te 
B)  Se 
C)  Mo 
D)  Nd 
E)  none of these

Question 6

Which of the following has the smallest atomic radius?

Accepted Answer

A)  N 
B)  F 
C)  Br 
D)  Cl 
E)  S 
A)  N 
B)  F 
C)  Br 
D)  Cl 
E)  S

Question 7

Which has the higher ionization energy, K or Br?

Accepted Answer

The answer of Which has the higher ionization energy, K...

Question 8

Choose the correct electron configuration for nitrogen in an excited state.

Accepted Answer

A)  1s22s22p23s1 
B)  1s22s22p22d1 
C)  1s22s22p3 
D)  1s22s22p33s1 
E)  1s22s22p33s13p1 
A)  1s22s22p23s1 
B)  1s22s22p22d1 
C)  1s22s22p3 
D)  1s22s22p33s1 
E)  1s22s22p33s13p1

Question 9

Choose the correct energy level diagram for the ground state of oxygen.

Accepted Answer

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

Question 10

The alkaline earth metals have how many valence electrons?

Accepted Answer

A)  8 
B)  7 
C)  3 
D)  2 
E)  1 
A)  8 
B)  7 
C)  3 
D)  2 
E)  1

Question 11

Which color of visible light has the least amount of energy per photon?

Accepted Answer

A)  violet 
B)  blue 
C)  green 
D)  yellow 
E)  red 
A)  violet 
B)  blue 
C)  green 
D)  yellow 
E)  red

Question 12

The maximum number of electrons allowed in the fourth energy level is

Accepted Answer

A)  2 
B)  4 
C)  8 
D)  18 
E)  32 
A)  2 
B)  4 
C)  8 
D)  18 
E)  32

Question 13

The electron configuration for the sulfur atom is

Accepted Answer

A)  1s22s22p63s23p4 
B)  1s22s22p63s23p6 
C)  1s22s22p63s23p2 
D)  1s22s22p63s6 
E)  none of these 
A)  1s22s22p63s23p4 
B)  1s22s22p63s23p6 
C)  1s22s22p63s23p2 
D)  1s22s22p63s6 
E)  none of these

Question 14

Which electron configuration indicates a transitional element?

Accepted Answer

A)  1s22s22p63s13p6 
B)  1s22s22p63s23p64s23d3 
C)  1s22s22p5 
D)  1s22s22p63s23p64s23d104p2 
E)  none of these 
A)  1s22s22p63s13p6 
B)  1s22s22p63s23p64s23d3 
C)  1s22s22p5 
D)  1s22s22p63s23p64s23d104p2 
E)  none of these

Question 15

State the maximum number of electrons allowed in each.
a. fourth principal energy level ____
b. any d sublevel ____
c. a 2p orbital ____

Accepted Answer

The answer of State the maximum number of electrons allowed...

Question 16

A given set of d orbitals consists of ____ orbital(s).

Accepted Answer

A)  1 
B)  3 
C)  5 
D)  6 
E)  none of these 
A)  1 
B)  3 
C)  5 
D)  6 
E)  none of these

Question 17

The number of unpaired electrons in an oxygen atom is

Accepted Answer

A)  2 
B)  3 
C)  6 
D)  5 
E)  1 
A)  2 
B)  3 
C)  6 
D)  5 
E)  1

Question 18

The lowest energy level to allow f orbitals is the fourth energy level.

Accepted Answer

A) True 
 B)False

Question 19

How does magnesium compare with sodium in terms of the following properties?
a. atomic size
b. number of outer-shell electrons
c. ionization energy
d. formula of the bromide salt

Accepted Answer

a. smaller

Question 20

Which of the following is ranked in order of largest to smallest atomic radius ?

Accepted Answer

A)  Rb > Mn > As > S > O 
B)  Mn > Rb > O > S > As 
C)  O > S > As > Mn > Rb 
D)  Rb > As > Mn > O > S 
E)  Rb > Mn > S > As > O 
A)  Rb > Mn > As > S > O 
B)  Mn > Rb > O > S > As 
C)  O > S > As > Mn > Rb 
D)  Rb > As > Mn > O > S 
E)  Rb > Mn > S > As > O

Exam 11: Modern Atomic Theory

Which of the following statements is correct and provides the best explanation for what happens when the first two electrons are removed from calcium?

What are the general trends in ionization energy a. across a period? b. down a group (family)?

The electron configuration for vanadium is

Which of the following has the electron configuration 1s22s22p63s23p64s23d5 ?

The element with the electron configuration [Kr] 5s24d105p4 is

Which of the following has the smallest atomic radius?

Which has the higher ionization energy, K or Br?

Choose the correct electron configuration for nitrogen in an excited state.

Choose the correct energy level diagram for the ground state of oxygen.

The alkaline earth metals have how many valence electrons?

Which color of visible light has the least amount of energy per photon?

The maximum number of electrons allowed in the fourth energy level is

The electron configuration for the sulfur atom is

Which electron configuration indicates a transitional element?

State the maximum number of electrons allowed in each. a. fourth principal energy level ____ b. any d sublevel ____ c. a 2p orbital ____

A given set of d orbitals consists of ____ orbital(s).

The number of unpaired electrons in an oxygen atom is

The lowest energy level to allow f orbitals is the fourth energy level.

How does magnesium compare with sodium in terms of the following properties? a. atomic size b. number of outer-shell electrons c. ionization energy d. formula of the bromide salt

Which of the following is ranked in order of largest to smallest atomic radius ?

Chemistry: an Introduction

Measurements and Calculations

Matter

Chemical Foundations: Elements, Atoms, and Ions

Nomenclature

Chemical Reactions: an Introduction

Reactions in Aqueous Solutions

Chemical Composition

Chemical Quantities

Energy

Chemical Bonding

Gases

Liquids and Solids

Solutions

Acids and Bases

Equilibrium

Oxidation-Reduction Reactions and Electrochemistry

Radioactivity and Nuclear Energy

Organic Chemistry

Biochemistry

Filters

Which of the following has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁵ ?

The element with the electron configuration [Kr] 5s²4d¹⁰5p⁴ is

State the maximum number of electrons allowed in each. a. fourth principal energy level b. any d sublevel c. a 2p orbital