Question 1

Which of the following have the same number of valence electrons?

Accepted Answer

A) Rb,Sb,I 
B) Ga,Sn,Bi 
C) As,Sb,Bi 
D) Ar,Kr,Br 
A) Rb,Sb,I 
B) Ga,Sn,Bi 
C) As,Sb,Bi 
D) Ar,Kr,Br

Question 2

What is the general valence-electron ground-state electron configuration for neutral alkaline earth metals?

Accepted Answer

A) ns1 
B) ns2 
C) 1s22s1 
D) 1s22s2 
A) ns1 
B) ns2 
C) 1s22s1 
D) 1s22s2

Question 3

To what uncertainty,in pm,can the position of an electron traveling at 1.89 × 105 m/s be measured if the uncertainty of the speed is 2.00%?

Accepted Answer

A) 765 
B) 654 
C) 8.33 × 104  
D) 1.53 × 105  
E) 1.53 × 104  
A) 765 
B) 654 
C) 8.33 × 104  
D) 1.53 × 105  
E) 1.53 × 104

Question 4

Calculate the energy in kJ/mol of light with a wavelength of 360 nm.

Accepted Answer

A) 5.52 × 10-22 kJ/mol 
B) 5.52 × 10-19 kJ/mol 
C) 332 kJ/mol 
D) 6.63 × 103 kJ/mol 
E) 0.332 kJ/mol 
A) 5.52 × 10-22 kJ/mol 
B) 5.52 × 10-19 kJ/mol 
C) 332 kJ/mol 
D) 6.63 × 103 kJ/mol 
E) 0.332 kJ/mol

Question 5

The Bohr theory explains that an emission spectral line is due to an electron losing energy but keeping the same values of its four quantum numbers.

Accepted Answer

A) True 
 B)False

Question 6

[Kr]5s24d105p5 is the ground state electronic configuration of ________.

Accepted Answer

A) Te 
B) I 
C) Br 
D) At 
E) S 
A) Te 
B) I 
C) Br 
D) At 
E) S

Question 7

The complete electron configuration of phosphorous,element 15,is:

Accepted Answer

A) 1s22s22p63s23p3 
B)      2p103s1 
C)      2p63s1 
D)    2s42p7 
E)    2s62p23s1 
A) 1s22s22p63s23p3 
B)      2p103s1 
C)      2p63s1 
D)    2s42p7 
E)    2s62p23s1

Question 8

The Bohr theory explains that an emission spectral line is due to an interaction between electrons in atoms.

Accepted Answer

A) True 
 B)False

Question 9

A radiation detector exposed to sunlight records the energy falling on a given area per unit time.If such a detector has a reading of 0.698 cal cm-2 min-1,how many photons of sunlight are striking each cm2 in one minute? Assume the average wavelength of sunlight is 460.nm.(4.184 J = 1 calorie)

Accepted Answer

A) 1.62 × 1018 photons 
B) 4.32 × 1019 photons 
C) 6.76 × 1018 photons 
D) 2.31 × 1018 photons 
E) 9.63 × 1019 photons 
A) 1.62 × 1018 photons 
B) 4.32 × 1019 photons 
C) 6.76 × 1018 photons 
D) 2.31 × 1018 photons 
E) 9.63 × 1019 photons

Question 10

The possible values of the magnetic quantum number,mℓ ,of a 3p electron are:

Accepted Answer

A) 0,1,2 
B) 2,1,0,-1,-2 
C) 0 
D) -1,0,+1 
E) +1,-1 
A) 0,1,2 
B) 2,1,0,-1,-2 
C) 0 
D) -1,0,+1 
E) +1,-1

Question 11

What is the total number of orbitals possible for n = 3?

Accepted Answer

A) 9 
B) 6 
C) 5 
D) 3 
E) 11 
A) 9 
B) 6 
C) 5 
D) 3 
E) 11

Question 12

A radiation detector exposed to sunlight records the energy falling on a given area per unit time.If such a detector has a reading of 0.430 cal cm-2 min-1,how many photons of sunlight are striking each cm2 in one minute? Assume the average wavelength of sunlight is 460.nm.(4.184 J = 1 calorie)

Accepted Answer

A) 2.02 × 107 photons 
B) 8.46 × 107 photons 
C) 4.17 × 1018 photons 
D) 1.02 × 1027 photons 
E) 4.25 × 1027 photons 
A) 2.02 × 107 photons 
B) 8.46 × 107 photons 
C) 4.17 × 1018 photons 
D) 1.02 × 1027 photons 
E) 4.25 × 1027 photons

Question 13

The Bohr theory explains that an emission spectral line is:

Accepted Answer

A) due to an electron losing energy but keeping the same values of its four quantum numbers 
B) due to an electron losing energy and changing orbits 
C) due to an interaction between electrons in two different principal orbits 
D) due to an electron gaining energy and changing orbits 
E) due to an increase in the principal quantum number n of an electron 
A) due to an electron losing energy but keeping the same values of its four quantum numbers 
B) due to an electron losing energy and changing orbits 
C) due to an interaction between electrons in two different principal orbits 
D) due to an electron gaining energy and changing orbits 
E) due to an increase in the principal quantum number n of an electron

Question 14

Electromagnetic radiation with a wavelength of 525 nm appears as green light to the human eye.The energy of one photon of this light is ________ J.

Accepted Answer

A) 1.04 × 10-31 
B) 3.79 ×   
C) 3.79 ×   
D) 1.04 × 10-22 
E) 2.64 ×   
A) 1.04 × 10-31 
B) 3.79 ×   
C) 3.79 ×   
D) 1.04 × 10-22 
E) 2.64 ×

Question 15

Use the spdf notation to write out the complete electron configuration of Br.

Accepted Answer

A) [Ar] 3d104s24p5  
B) [Kr] 3d104s24p4  
C) [Ar] 3d94s24p6  
D) [Ar] 3d104p65s2  
E) [Ar] 4s24p24d9  
A) [Ar] 3d104s24p5  
B) [Kr] 3d104s24p4  
C) [Ar] 3d94s24p6  
D) [Ar] 3d104p65s2  
E) [Ar] 4s24p24d9

Question 16

The element that corresponds to the electron configuration 1s22s22p3 is:

Accepted Answer

A) carbon 
B) lithium 
C) beryllium 
D) boron 
E) nitrogen 
A) carbon 
B) lithium 
C) beryllium 
D) boron 
E) nitrogen

Question 17

An atomic orbital:
I.describes a region of high electron density.
II.describes a region in an atom where an electron is likely to be found.
III.is a wave function resulting from specific values assigned to quantum numbers in wave equations.
IV.describes a spherical region around a nucleus where an electron can be found.

Accepted Answer

A) II only 
B) I and II 
C) II and III 
D) I,II,and III 
E) I,II,III,and IV 
A) II only 
B) I and II 
C) II and III 
D) I,II,and III 
E) I,II,III,and IV

Question 18

The following orbitals are placed in the correct filling order:
6s,4f,5d,6p.

Accepted Answer

A) True 
 B)False

Question 19

Which statement regarding the wave function as suggested by Erwin Schrodinger is INCORRECT?

Accepted Answer

A) It has fluctuating values at all points on the curve. 
B) It is a mathematical equation. 
C) It is denoted by psi (Ψ). 
D) It can describe any particle with wavelike motions. 
E) It corresponds to a standing wave within the boundary of the system. 
A) It has fluctuating values at all points on the curve. 
B) It is a mathematical equation. 
C) It is denoted by psi (Ψ). 
D) It can describe any particle with wavelike motions. 
E) It corresponds to a standing wave within the boundary of the system.

Question 20

What is the wavelength,in nm,of the spectral line resulting from the transition of an electron from n = 3 to n = 2 in a Bohr hydrogen atom? The constant for Balmer's equation is 3.2881 × 1015 s-1.

Accepted Answer

A) 18.3 nm 
B) 656 nm 
C) 547 nm 
D) 152 nm 
E) 252 nm 
A) 18.3 nm 
B) 656 nm 
C) 547 nm 
D) 152 nm 
E) 252 nm

Exam 8: Electrons in Atoms

Which of the following have the same number of valence electrons?

What is the general valence-electron ground-state electron configuration for neutral alkaline earth metals?

To what uncertainty,in pm,can the position of an electron traveling at 1.89 × 105 m/s be measured if the uncertainty of the speed is 2.00%?

Calculate the energy in kJ/mol of light with a wavelength of 360 nm.

The Bohr theory explains that an emission spectral line is due to an electron losing energy but keeping the same values of its four quantum numbers.

[Kr]5s24d105p5 is the ground state electronic configuration of ________.

The complete electron configuration of phosphorous,element 15,is:

The Bohr theory explains that an emission spectral line is due to an interaction between electrons in atoms.

A radiation detector exposed to sunlight records the energy falling on a given area per unit time.If such a detector has a reading of 0.698 cal cm-2 min-1,how many photons of sunlight are striking each cm2 in one minute? Assume the average wavelength of sunlight is 460.nm.(4.184 J = 1 calorie)

The possible values of the magnetic quantum number,mℓ ,of a 3p electron are:

What is the total number of orbitals possible for n = 3?

A radiation detector exposed to sunlight records the energy falling on a given area per unit time.If such a detector has a reading of 0.430 cal cm-2 min-1,how many photons of sunlight are striking each cm2 in one minute? Assume the average wavelength of sunlight is 460.nm.(4.184 J = 1 calorie)

The Bohr theory explains that an emission spectral line is:

Electromagnetic radiation with a wavelength of 525 nm appears as green light to the human eye.The energy of one photon of this light is ________ J.

Use the spdf notation to write out the complete electron configuration of Br.

The element that corresponds to the electron configuration 1s22s22p3 is:

The following orbitals are placed in the correct filling order: 6s,4f,5d,6p.

Which statement regarding the wave function as suggested by Erwin Schrodinger is INCORRECT?

What is the wavelength,in nm,of the spectral line resulting from the transition of an electron from n = 3 to n = 2 in a Bohr hydrogen atom? The constant for Balmer's equation is 3.2881 × 1015 s-1.

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

To what uncertainty,in pm,can the position of an electron traveling at 1.89 × 10⁵ m/s be measured if the uncertainty of the speed is 2.00%?

[Kr]5s²4d¹⁰5p⁵ is the ground state electronic configuration of ________.

A radiation detector exposed to sunlight records the energy falling on a given area per unit time.If such a detector has a reading of 0.698 cal cm^-2 min^-1,how many photons of sunlight are striking each cm² in one minute? Assume the average wavelength of sunlight is 460.nm.(4.184 J = 1 calorie)

The possible values of the magnetic quantum number,m_ℓ ,of a 3p electron are:

A radiation detector exposed to sunlight records the energy falling on a given area per unit time.If such a detector has a reading of 0.430 cal cm^-2 min^-1,how many photons of sunlight are striking each cm² in one minute? Assume the average wavelength of sunlight is 460.nm.(4.184 J = 1 calorie)

The element that corresponds to the electron configuration 1s²2s²2p³ is:

What is the wavelength,in nm,of the spectral line resulting from the transition of an electron from n = 3 to n = 2 in a Bohr hydrogen atom? The constant for Balmer's equation is 3.2881 × 10¹⁵ s^-1.