The bond angles are cos −1(− 1⁄ 3) = 109.4712206.° ≈ 109.5° when all four substituents are the same, as in methane ( CH 4) as well as its heavier analogues. In a tetrahedral molecular geometry, a central atom is located at the center with four substituents that are located at the corners of a tetrahedron.
Central atom with four substituents located at the corners of a tetrahedron Tetrahedral molecular geometry
