The molecular geometry of the ch_4 molecule is and the molecule is seesaw, nonpolar linear, polar trigonal pyramidal, polar tetrahedral, polar tetrahedral, nonpolar

nonpolar tetrahedral

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 ,

The number of valence electrons =  8

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

Number of valence electrons used in skeletal structure = 8

So,  

Remaining valence electrons = 0

The Lewis structure of the compound is shown below:

       H

        :

      C            

  :          :          :

H             H       H

The geometry is tetrahedral ,

And , the molecule is non polar in nature .

the volume increases

a polar bond is formed when electrons are shared unevenly between atoms