Chemistry homework help

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Pre-Lab Questions:

1. Describe the difference between valence and core electrons.
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2. What is the octet rule and which elements obey the octet rule?
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3. How does VSEPR affect the shape of molecules?
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4. What effect does the presence of lone-pair electrons have on the bond angles in a molecule?
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Experiment 1: Molecular Models of Neutral Molecules
Part 1: Periodic Table
Table 1: Lewis Dot Structures

 
Table 1 Upload of Lewis Dot Structure Sketches with your name and access code handwritten in the background:
 
 
 
 
 
 
Part 2: Construction of Molecules
Table 2

 
Table 2 Upload of Lewis Dot Structure Sketches and Molecular Models (Table 2a) with your name and access code handwritten in the background:
 
Table 2 Upload of Lewis Dot Structure Sketches and Molecular Models (Table 2b) with your name and access code handwritten in the background:
 
 
 
Post-Lab Questions:

1. Should all of the angles in methane (CH₄) be equal? Why or why not?

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2. What additional information does the VSEPR theory give you beyond electron dot structures, in terms of molecular structure?

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3. Sketch the molecular shape of the following compounds. Be sure to label the bond angles. Upload the photo below.

Table 3

 
Table 3 Upload of molecular shape sketches with your name and access code handwritten in the background: