Lewis Structure Quiz

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, PhD, Chemistry

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Quizzes Created: 40 | Total Attempts: 355,721

Questions: 10 | Attempts: 20,234 | Updated: Mar 27, 2024

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Welcome to the Lewis Structure Quiz! We have an amazing and informative "Lewis structure quiz" for you here. Lewis structure is a diagram that shows the bonding among the atoms of a molecule as well as lone pairs of electrons that may be there in the molecule. Test your knowledge of molecular structures with this engaging quiz. Explore the world of covalent bonding as you decipher Lewis structures, mastering the art of representing atoms and their valence electrons.

Challenge yourself with diverse molecules and learn to predict their shapes. This quiz is designed to enhance your understanding of Read morechemical bonding, making it perfect for students and enthusiasts alike. Get ready to showcase your skills in drawing Lewis structures and unravel the mysteries of molecular geometry. Are you up for the challenge? Dive into the Lewis Structure Quiz and elevate your understanding of chemical structures!

Questions and Answers

1.

What is the Lewis structure for Water?
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
Correct Answer
A. A

Explanation
The Lewis structure for water is represented by the given option A. In this structure, the oxygen atom is in the center and is bonded to two hydrogen atoms. The oxygen atom has two lone pairs of electrons. This structure follows the octet rule, where each atom has a full valence shell with eight electrons. The Lewis structure accurately represents the bonding and electron arrangement in a water molecule.

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2.

Lewis structure was introduced in which year?
- A.
  
  1911
- B.
  
  1915
- C.
  
  1916
- D.
  
  1977
Correct Answer
C. 1916

Explanation
The Lewis structure was introduced in 1916. This structure, developed by Gilbert N. Lewis, is a way to represent the arrangement of atoms and electrons in a molecule. It uses lines to represent chemical bonds between atoms and dots to represent valence electrons. The Lewis structure is a fundamental tool in chemistry for understanding and predicting the behavior of molecules.

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1
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3.

"Lewis dot formulas" is another name for Lewis structures.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The statement is true because "Lewis dot formulas" and "Lewis structures" are two different names used interchangeably to refer to the same concept in chemistry. Lewis structures are diagrams that represent the bonding between atoms in a molecule and the placement of electrons. The dots in the diagrams represent valence electrons, and they are named after Gilbert N. Lewis, who developed this notation. Therefore, "Lewis dot formulas" is indeed another name for Lewis structures.

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1
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4.

Lewis structure shows the bonding of atoms.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The Lewis structure is a diagram that represents the bonding of atoms in a molecule. It uses dots to represent valence electrons and lines to represent bonds between atoms. This diagram provides information about the arrangement of atoms and the sharing or transfer of electrons, which ultimately determines the chemical properties and behavior of the molecule. Therefore, the statement "Lewis structure shows the bonding of atoms" is true.

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5.

What is the Lewis formula for ammonia (NH₃)?
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
Correct Answer
A. A

Explanation
The Lewis formula for ammonia (NH3) is a representation of its molecular structure, showing the arrangement of atoms and their bonding. In this case, the Lewis formula A is the correct answer, as it correctly depicts ammonia as having one nitrogen atom bonded to three hydrogen atoms. The Lewis formula is a useful tool for visualizing the bonding patterns and electron distribution in molecules.

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6.

Lewis structure was first founded by Robert Boyle.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The statement is false because the Lewis structure was actually first founded by Gilbert N. Lewis, not Robert Boyle. Lewis introduced the concept of electron dot structures in 1916, which are now commonly known as Lewis structures. These structures are used to represent the bonding and non-bonding electrons in a molecule or ion.

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7.

In Lewis structure, _______ are used to represent shared pairs.
- A.
  
  Dots
- B.
  
  Lines
- C.
  
  Circles
- D.
  
  None
Correct Answer
B. Lines

Explanation
In Lewis structures, lines are used to represent shared pairs. This is because a line is a common convention used to represent a covalent bond, which is formed when two atoms share a pair of electrons. The line indicates that the two atoms are connected by a bond and are sharing electrons.

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8.

What is the Lewis structure for Oxygen (O2)
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
Correct Answer
B. B

Explanation
The Lewis structure for Oxygen (O2) is represented by the option B. This is because Oxygen has 6 valence electrons, and in the Lewis structure, each Oxygen atom shares a double bond, resulting in a total of 4 shared electrons. The remaining 2 electrons are unshared, also known as lone pairs. Therefore, option B correctly shows the arrangement of the shared and unshared electrons in the Oxygen molecule.

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9.

Which of the following has two bonding pairs and two unshared pairs of electrons?
- A.
  
  CCl4
- B.
  
  H2S
- C.
  
  NH3
- D.
  
  CO2
Correct Answer
C. NH3

Explanation
In the Lewis structure of NH3 (ammonia), each hydrogen atom shares one electron with nitrogen, forming three covalent bonds. Nitrogen also has one unshared pair of electrons, resulting in a total of two bonding pairs and two unshared pairs around the nitrogen atom.

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10.

What is the Lewis structure for SF₂?
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  None
Correct Answer
B. B

Explanation
The Lewis structure for SF2 is shown in option B. In this structure, sulfur (S) is the central atom and is surrounded by two fluorine (F) atoms. Each fluorine atom forms a single bond with the sulfur atom, resulting in a linear molecular geometry. The Lewis structure accurately represents the arrangement of atoms and the bonding in SF2.

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