Aldehyde Functional Groups and Valence Electrons

The video tutorial explains the Lewis structure of H2CO, detailing the arrangement of 12 valence electrons. Carbon is placed in the center, with hydrogens on the outside and oxygen above. Electrons are distributed to form bonds and fill the octet of oxygen. A double bond is formed between carbon and oxygen to complete the octet for carbon. The video also introduces aldehydes, highlighting formaldehyde as the simplest example, and concludes with a summary of the structure.

What is the total number of valence electrons in the H2CO Lewis structure?

• 10

• 12

• 16

• 14

Which atom is placed at the center of the H2CO Lewis structure?

• Carbon

• Oxygen

• Hydrogen

• Nitrogen

How many valence electrons does carbon have after forming a double bond with oxygen in H2CO?

• 12

• 8

• 6

• 10

What is the purpose of forming a double bond between carbon and oxygen in H2CO?

• To reduce the number of valence electrons

• To complete the octet of carbon

• To increase the number of hydrogen atoms

• To make oxygen more electronegative

What is a defining feature of an aldehyde functional group?

• A single-bonded oxygen atom

• A carbon atom triple-bonded to another carbon

• A hydrogen atom attached to a carbon with a double-bonded oxygen

• A carbon atom double-bonded to nitrogen

Which molecule is the simplest form of an aldehyde?

• Ethanol

• Acetone

• Methanol

• Formaldehyde