Lewis Structure and VSEPR Builder

Instructions

  1. Use the formula and periodic table to count valence electrons and build the Lewis structure step by step.
  2. Choose the bonding, lone pairs, and molecular geometry. Use Hint and review the explanations when needed.
  3. Practice options lets you choose a structure, start a new round, or switch to the AP setting. Finish a full mixed round for a completion code.

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Main groups, periods 1 to 5. Under each group number: valence electrons (He has 2).

Practice options

Start a fresh mixed round or work on one structure. Starting again clears this round.

Adds structures with more than 8 electrons around the center, and a step that picks the best structure by formal charge. Applies from the next round or chosen structure.

About this activity

Build Lewis structures step by step, then predict each molecule's shape, bond angle and polarity. Hints and feedback guide you at every step.

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