Lewis Diagrams and VSEPR Models

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Chemistry, Science, Physics
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11th Grade - University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary purpose of using Lewis diagrams and VSEPR models together?
To determine the atomic mass
To calculate the speed of chemical reactions
To predict the color of molecules
To predict molecular structure and properties
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in drawing a Lewis structure?
Reviewing formal charges
Sketching the molecular skeleton
Adding valence electrons
Determining bond angles
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When drawing a Lewis structure, to which atoms should electrons generally be added first?
The atom with the highest atomic number
The most electronegative atoms
The least electronegative atoms
The central atom
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the Lewis structure of hydrogen cyanide, what is the formal charge on nitrogen?
+2
0
-1
+1
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the VSEPR model primarily help predict?
Molecular speed
Molecular weight
Molecular geometry
Molecular color
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What shape does a molecule with two pairs of electrons typically have according to VSEPR theory?
Trigonal planar
Bent
Tetrahedral
Linear
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the bond angle in a trigonal planar VSEPR model?
180 degrees
90 degrees
109.5 degrees
120 degrees
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