Yellow ball=hydrogen atomBlack ball=Carbon atom
Wood stick=polar covalent bond
Methane molecule is shown above and the formula for the Methane molecule is CH4. As the photograph shows, four hydrogen atoms are single bonded to carbon atom and each bond has angle of 109.5 degree. The bonds satisfies octet rule for carbon atom as well as duet rule for hydrogen atoms. The overall structure of the methane is tetrahedral structure because the tetrahedral arrangement of electron pairs produces a tetrahedral arrangement of hydrogen atoms and thus, the structure of methane is tetrahedron. In addition, it cannot be trigonal pyramid because it has a tetrahedral arrangement of electron pairs and as well as a tetrahedral arrangement of atoms.
