Lewis Structure Generator
Arsine · AsH₃

AsH₃ Lewis Structure

Arsenic forms three As–H bonds and retains one lone pair, analogous to PH₃ and SbH₃.

Open AsH₃ in the generatorSee drawing steps
AsH₃
AsH₃
Reviewed stored connectivity; detailed electron placement is explained below
Total valence electrons8
Reviewed connectivityAsH₃
GeometryTrigonal pyramidal, about 91.8°
Support levelReviewed guide

Arsine overview

The stored Lewis connectivity is AsH₃. Arsenic forms three As–H bonds and retains one lone pair, analogous to PH₃ and SbH₃.

How to draw AsH₃

  1. Count 8 valence electrons. Include charge adjustments before drawing.
  2. Use the reviewed connectivity AsH₃. Do not infer a different isomer from the formula alone.
  3. Place the required single, double or multiple bonds. Keep a running electron total.
  4. Complete terminal valence shells and add lone pairs or formal charges. Arsenic forms three As–H bonds and retains one lone pair, analogous to PH₃ and SbH₃.
  5. Verify the total electron count and geometry. The reviewed geometry is Trigonal pyramidal, about 91.8°.

Why this example matters

Arsenic forms three As–H bonds and retains one lone pair, analogous to PH₃ and SbH₃.

Scope and model limits

Simple sp³ labels are only classroom shorthand for heavier group-15 hydrides.

Common mistakes

  • Forgetting the arsenic lone pair
  • Calling the molecule trigonal planar
  • Drawing As=H bonds

Last reviewed: 2026-07-16. Educational reference only; verify graded work with course materials.