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Experiment #2 MOLECULAR GEOMETRY PRELAB ASSIGNMENT Part I 1. View the short video on the Prelab Preparation page in Canvas explaining how to use the PhET simulation for Molecule Shapes. 2. Open the PhET simulation that is embedded on the Prelab Preparation page in Canvas. 3. Build the molecules in the first column of Table I below and on the next page. Fill in the Bond Angle and Molecular Geometry columns for all of them. 4. In the Geometry Virtual Lab document, carefully read the section Counting Electron Domains in the Background section for Part II. 5. Fill in the last three columns of Table I. * # BD = number of bonding domains surrounding the central atom = # atoms bonded to it (no matter if it is a single, double, or triple bond). * # NBD = number of nonbonding domains surrounding the central atom = # lone pairs * # TD = total number of domains surrounding the central atom = # BD + # NBD 6. Go to the Geometry Report Sheet document and fill in Table II-A based on the information in Table I here. After this Prelab Assignment has been graded, check the instructor feedback, then make any necessary corrections to Table II-A on the Report Sheet. Table I: Bond Angles and Molecular Geometry Names for Different Numbers of Electron Domains Molecule Bond Angle Molecular Geometry # BD # NBD TD

          Experiment #2
MOLECULAR GEOMETRY

PRELAB ASSIGNMENT

Part I

1. View the short video on the Prelab Preparation page in Canvas explaining how to use the PhET simulation for Molecule Shapes.

2. Open the PhET simulation that is embedded on the Prelab Preparation page in Canvas.

3. Build the molecules in the first column of Table I below and on the next page. Fill in the Bond Angle and Molecular Geometry columns for all of them.

4. In the Geometry Virtual Lab document, carefully read the section Counting Electron Domains in the Background section for Part II.

5. Fill in the last three columns of Table I.
* # BD = number of bonding domains surrounding the central atom = # atoms bonded to it (no matter if it is a single, double, or triple bond).
* # NBD = number of nonbonding domains surrounding the central atom = # lone pairs
* # TD = total number of domains surrounding the central atom = # BD + # NBD

6. Go to the Geometry Report Sheet document and fill in Table II-A based on the information in Table I here.
After this Prelab Assignment has been graded, check the instructor feedback, then make any necessary corrections to Table II-A on the Report Sheet.

Table I: Bond Angles and Molecular Geometry Names for Different Numbers of Electron Domains

Molecule Bond Angle Molecular Geometry # BD # NBD TD

Experiment #2
MOLECULAR GEOMETRY

PRELAB ASSIGNMENT

Part I

1. View the short video on the Prelab Preparation page in Canvas explaining how to use the PhET simulation for Molecule Shapes.

2. Open the PhET simulation that is embedded on the Prelab Preparation page in Canvas.

3. Build the molecules in the first column of Table I below and on the next page. Fill in the Bond Angle and Molecular Geometry columns for all of them.

4. In the Geometry Virtual Lab document, carefully read the section Counting Electron Domains in the Background section for Part II.

5. Fill in the last three columns of Table I.
* # BD = number of bonding domains surrounding the central atom = # atoms bonded to it (no matter if it is a single, double, or triple bond).
* # NBD = number of nonbonding domains surrounding the central atom = # lone pairs
* # TD = total number of domains surrounding the central atom = # BD + # NBD

6. Go to the Geometry Report Sheet document and fill in Table II-A based on the information in Table I here.
After this Prelab Assignment has been graded, check the instructor feedback, then make any necessary corrections to Table II-A on the Report Sheet.

Table I: Bond Angles and Molecular Geometry Names for Different Numbers of Electron Domains

Molecule Bond Angle Molecular Geometry # BD # NBD TD

Added by Patricia W.

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