Chapter 2, Problem 2.7YT

Interpretation Introduction

Interpretation:

Like ${\text{CO}}_{\text{2}}$, ${\text{BeH}}_{\text{2}}$ is a linear nonpolar molecule. Using the structure shown, the dipole arrows above each $\text{Be-H}$ bond is to be drawn.

Concept introduction:

A polar covalent bond arises when atoms having different electronegativities are bonded together and the resulting bond dipole points toward the more electronegative atom. ${\text{BeH}}_{\text{2}}$ is nonpolar because the two $\text{Be-H}$ bond dipoles point in exactly opposite directions and are completely canceled by vector addition.