| 1. Draw the Lewis structure for the molecule or ion. |
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| 2. Count the total number of regions of high electron density (bonding and unshared electron pairs) around the central atom. |
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| 3. Identify the most stable arrangement of the regions of high electron density. |
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| 4. Determine the positions of the atoms based on the types of electron pairs (i.e., bonding pairs vs. unshared pairs). |
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| 5. Identify the molecular structure based on the positions of the atoms (NOT the electron pairs). |
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Show Model of CH4 |