Question 1

Which element has the following electron configuration: 1S₂ 2S₂ 2p6 3S₂ 3p6 4S₂ 3d10 4p6 5S₂?

Accepted Answer

A) Ca 
B) Rb 
C) Sn 
D) Sr 
E) none of the above 
A) Ca 
B) Rb 
C) Sn 
D) Sr 
E) none of the above

Question 2

What is the term for an orbit that electrons occupy at a fixed distance from the nucleus;designated 1,2,3,4 ...?

Accepted Answer

A) energy level 
B) orbital 
C) shell 
D) subshell 
E) none of the above 
A) energy level 
B) orbital 
C) shell 
D) subshell 
E) none of the above

Question 3

Which element has the following electron configuration: 1S₂ 2S₂ 2p6 3S₂ 3p6 4S₂ 3d10 4p6 5S₂ 4d5?

Accepted Answer

A) Br 
B) Mn 
C) Nb 
D) Tc 
E) none of the above 
A) Br 
B) Mn 
C) Nb 
D) Tc 
E) none of the above

Question 4

Which of the following of Dalton's proposals is still valid?

Accepted Answer

A) Atoms are indivisible. 
B) Atoms are indestructible. 
C) All atoms of an element are identical. 
D) all of the above 
E) none of the above 
A) Atoms are indivisible. 
B) Atoms are indestructible. 
C) All atoms of an element are identical. 
D) all of the above 
E) none of the above

Question 5

Which of the following is true for both an orbit and an orbital?

Accepted Answer

A) An orbit and an orbital always contain two electrons. 
B) An orbit and an orbital can be described as elliptical. 
C) An orbit and an orbital represent a fixed energy state. 
D) An orbit and an orbital represent an electron boundary. 
E) all of the above 
A) An orbit and an orbital always contain two electrons. 
B) An orbit and an orbital can be described as elliptical. 
C) An orbit and an orbital represent a fixed energy state. 
D) An orbit and an orbital represent an electron boundary. 
E) all of the above

Question 6

Which of the following types of radiation has the longest wavelength?

Accepted Answer

A) X rays 
B) ultraviolet 
C) visible 
D) infrared 
E) All radiation has the same wavelength. 
A) X rays 
B) ultraviolet 
C) visible 
D) infrared 
E) All radiation has the same wavelength.

Question 7

Which of the following is true of an electron orbit?

Accepted Answer

A) An electron orbit is a fixed energy state. 
B) An electron orbit represents an energy level. 
C) An electron orbit may contain eight electrons. 
D) An electron orbit increases in size with greater energy. 
E) all of the above 
A) An electron orbit is a fixed energy state. 
B) An electron orbit represents an energy level. 
C) An electron orbit may contain eight electrons. 
D) An electron orbit increases in size with greater energy. 
E) all of the above

Question 8

How many photons of light are emitted when the electrons in 10 hydrogen atoms drop from energy level 3 to 1?

Accepted Answer

A) 1 
B) 10 
C) 20 
D) 30 
E) none of the above 
A) 1 
B) 10 
C) 20 
D) 30 
E) none of the above

Question 9

Which of the following energy-level changes for an electron is most energetic?

Accepted Answer

A) 2 → 1 
B) 3 → 2 
C) 4 → 3 
D) 5 → 4 
E) All changes have the same energy. 
A) 2 → 1 
B) 3 → 2 
C) 4 → 3 
D) 5 → 4 
E) All changes have the same energy.

Question 10

Which of the following colors of light has the shortest wavelength?

Accepted Answer

A) violet 
B) green 
C) yellow 
D) red 
E) All colors have the same wavelength. 
A) violet 
B) green 
C) yellow 
D) red 
E) All colors have the same wavelength.

Question 11

What is the electron configuration for an atom of silicon?

Accepted Answer

A) 1S₂ 2S₂ 2p4 
B) 1S₂ 2S₂ 2p6 3S₂ 
C) 1S₂ 2S₂ 2p6 3S₂ 3p2 
D) 1S₂ 2S₂ 2p6 3S₂ 3p4 
E) none of the above 
A) 1S₂ 2S₂ 2p4 
B) 1S₂ 2S₂ 2p6 3S₂ 
C) 1S₂ 2S₂ 2p6 3S₂ 3p2 
D) 1S₂ 2S₂ 2p6 3S₂ 3p4 
E) none of the above

Question 12

What is the term for a broad uninterrupted band of radiant energy?

Accepted Answer

A) continuous spectrum 
B) radiant energy spectrum 
C) ultraviolet spectrum 
D) visible spectrum 
E) none of the above 
A) continuous spectrum 
B) radiant energy spectrum 
C) ultraviolet spectrum 
D) visible spectrum 
E) none of the above

Question 13

Which of the following orbitals is the largest in size?

Accepted Answer

A) 1s 
B) 2s 
C) 3s 
D) 4s 
E) all s orbitals are the same size 
A) 1s 
B) 2s 
C) 3s 
D) 4s 
E) all s orbitals are the same size

Which element has the following electron configuration: 1S₂ 2S₂ 2p6 3S₂ 3p6 4S₂ 3d10 4p6 5S₂?

What is the term for an orbit that electrons occupy at a fixed distance from the nucleus;designated 1,2,3,4 ...?

Which element has the following electron configuration: 1S₂ 2S₂ 2p6 3S₂ 3p6 4S₂ 3d10 4p6 5S₂ 4d5?

Which of the following of Dalton's proposals is still valid?

Which of the following is true for both an orbit and an orbital?

Which of the following types of radiation has the longest wavelength?

Which of the following is true of an electron orbit?

How many photons of light are emitted when the electrons in 10 hydrogen atoms drop from energy level 3 to 1?

Which of the following energy-level changes for an electron is most energetic?

Which of the following colors of light has the shortest wavelength?

What is the electron configuration for an atom of silicon?

What is the term for a broad uninterrupted band of radiant energy?

Which of the following orbitals is the largest in size?

Introduction to Chemistry

The Metric System

Matter and Energy

The Periodic Table

Language of Chemistry

Chemical Reactions

The Mole Concept

Chemical Equation Calculations

Gases

Liquids and Solids

Chemical Bonding

Solutions

Acids and Bases

Advanced Problem Solving

Chemical Equilibrium

Oxidation and Reduction

Nuclear Chemistry

Organic Chemistry

Biochemistry

Interlude: Prerequisite Science Skills

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Exam 4: Models of the Atom

Which element has the following electron configuration: 1S₂ 2S₂ 2p6 3S₂ 3p6 4S₂ 3d10 4p6 5S₂?

What is the term for an orbit that electrons occupy at a fixed distance from the nucleus;designated 1,2,3,4 ...?

Which element has the following electron configuration: 1S₂ 2S₂ 2p6 3S₂ 3p6 4S₂ 3d10 4p6 5S₂ 4d5?

Which of the following of Dalton's proposals is still valid?

Which of the following is true for both an orbit and an orbital?

Which of the following types of radiation has the longest wavelength?

Which of the following is true of an electron orbit?

How many photons of light are emitted when the electrons in 10 hydrogen atoms drop from energy level 3 to 1?

Which of the following energy-level changes for an electron is most energetic?

Which of the following colors of light has the shortest wavelength?

What is the electron configuration for an atom of silicon?

What is the term for a broad uninterrupted band of radiant energy?

Which of the following orbitals is the largest in size?

Introduction to Chemistry

The Metric System

Matter and Energy

The Periodic Table

Language of Chemistry

Chemical Reactions

The Mole Concept

Chemical Equation Calculations

Gases

Liquids and Solids

Chemical Bonding

Solutions

Acids and Bases

Advanced Problem Solving

Chemical Equilibrium

Oxidation and Reduction

Nuclear Chemistry

Organic Chemistry

Biochemistry

Interlude: Prerequisite Science Skills

Filters