C2H2 Molecular Structure and Bonds

This video tutorial explains how to draw the Lewis structure for ethyne (C2H2), also known as acetylene. It begins by counting the valence electrons of carbon and hydrogen, then places the atoms and initial bonds. The tutorial demonstrates how to adjust the bonds to form a stable molecule with octets for the carbon atoms, resulting in a triple bond. Finally, it describes the linear molecular geometry of ethyne.

What is another name for the compound C2H2?

• Methane

• Ethyne

• Propane

• Butane

How many valence electrons does a carbon atom have?

• 2

• 4

• 6

• 8

Where are hydrogen atoms placed in a Lewis structure?

• At the center

• On the outside

• Between carbon atoms

• Next to oxygen atoms

How many valence electrons are initially used to form bonds in the C2H2 structure?

• 10

• 8

• 6

• 4

What is the term used to describe a stable molecule with eight valence electrons?

• Duet

• Sextet

• Octet

• Quartet

What type of bond is formed between the carbon atoms to achieve the octet rule?

• Single bond

• Quadruple bond

• Double bond

• Triple bond

How many valence electrons does each carbon atom have after forming a triple bond?

• 6

• 7

• 8

• 9

What is the molecular geometry of C2H2?

• Bent

• Trigonal planar

• Linear

• Tetrahedral

Which of the following represents the bonds in the Lewis structure of C2H2?

• Single lines

• Double lines

• Triple lines

• Dotted lines

What is the position of hydrogen atoms in the molecular geometry of C2H2?

• On the outside

• Below the carbon atoms

• Above the carbon atoms

• At the center