Hydrogen sulfide (H₂S) is a covalent compound made from two hydrogen (H) atoms bonded to a central sulfur (S) atom. Two single covalent bonds are formed in the molecule. The hybridization in H₂S is sp³ with tetrahedral geometry. Sulfur has two pairs of nonbonding electrons. The lone pairs repel the bonded electrons, pushing the S-H bonds inward. As a result, the bond angle is 92.1° instead of the usual 109.28° for tetrahedral. The decrease in angle leads to a bent or v-shaped structure, as shown below ^[1-4].

The electronegativity of hydrogen is 2.2, and that of sulfur is 2.58. Therefore, the electronegativity difference is 0.38. It makes the S-H bond slightly polar. The asymmetric bent shape also makes the H₂S molecule slightly polar.