# What is the Lewis dot diagram for H_2O?

The $\text{electronic geometry}$ is tetrahedral to a first approximation. The $\text{molecular geometry}$ is bent with $\angle H - O - H \cong {104.5}^{\circ}$; the (non-bonding) lone pairs are closer to the oxygen atom, and these tend to compress $\angle H - O - H$ down from the ideal tetrahedral angle of ${109.5}^{\circ}$.