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Lewis diagram guide3 steps · use the arrow keys or the buttons
  1. Find the outer electrons. Write the electron arrangement. The last number is the number of dots.
  2. Place the dots. Put the first four dots on the right, top, left and bottom, then pair them up in the same order.
  3. Make the ion. Metals lose their outer electrons, so the ion has no dots. Non-metals gain electrons up to eight. Draw square brackets and the charge.

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