Question

What is the H-C-H bond angle predicted by Lewis for CH3+?

Answer 1

Answer:

bond angle = 120 °

Explanation:

Lewis structure is used to represent the arrangement of the electrons around the atom in a molecule. The electrons are shown by dots and the bonding electrons are shown by line between the two atoms.

For $CH_{3}^+$,

The number of valence electrons = $(4\times 1)+(1\times 3)-1$ = 6  

The skeleton structure of the compound is in which one C molecule act as a central atom and is bonded to the three H with one sigma bond each.

Number of valence electrons used in skeletal structure = 6

So,  

Remaining valence electrons = 0

The Lewis structure of the compound is shown below:

       H

        :

      C⁺

  :          :

H             H

The geometry is trigonal planar which has an angle of 120 °.