Understanding the CH3+ Ion

The video tutorial explains the Lewis structure of CH3+, the Methylium Cation. It begins by detailing the valence electrons for Carbon and Hydrogen, noting the loss of an electron due to the positive charge. The tutorial then guides viewers through drawing the structure, placing Hydrogens around Carbon and using all six valence electrons to form bonds. The formal charge of +1 on Carbon is discussed, indicating the molecule's instability. The video concludes with a visualization of the Hydrogen atom arrangement and a summary by Dr. B.

How many total valence electrons are present in the CH3+ ion?

• 4

• 5

• 6

• 7

What is the best way to arrange the atoms in the CH3+ Lewis structure?

• Carbon and hydrogens in a triangular shape

• All atoms in a straight line

• Hydrogens in the center with carbon around them

• Carbon in the center with hydrogens around it

What does the plus sign next to the carbon atom in CH3+ indicate?

• It has gained an electron

• It is neutral

• It has a negative charge

• It has a positive charge

What is the formal charge of the carbon atom in CH3+?

• 0

• +1

• -1

• +2

Why is CH3+ considered to be unstable?

• It has too many electrons

• It is a very common molecule

• It lacks a full octet for carbon

• It has a negative charge