MOLECULAR STRUCTURE OF METHANE AND ETHYNE

      Methane

Ethyne (common name acetylene)

    INSTRUCTIONS

Find each of the following and record on the previous sheet.

1.)Chemical Formula:  Left Click and hold to rotate molecule to determine the # of atoms or each element.

2.) Which molecule has a double bond?

3.) Molecular Geometry: Left Click and hold to rotate molecule. (see Molecular Structures Review for help)

    a. What is the name of the molecular geometry for methane?

    b. What is the name of the molecular geometry for ethyne?

4.) Bond Distance: Use the Instructions below to determine:

a.) What is the bond distance between the carbon and hydrogen in the methane molecule?

b.) What is the bond distance between the two carbons in the ethyne molecule?

Chime has the capability to measure bond distances, bond angles and torsion angles.  Click on the function on the right you want.

To measure a bond distance you click on two adjacent atoms in succession, the distance is reported in angstroms after clicking on the second atom.  Multiple by 100 to convert to picometers (pm).