(Polar molecules, Non-polar molecules, etc.)
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How do you determine a bond angle? For example, on page 110 of the textbook, it provides the example of Beryllium chloride of having bond angles of 180, and the shape is linear. That makes sense to me, since the atoms are on opposite sides. However, a tetrahedral arrangement, as seen in Methane, has bond angles of 109.5. How is this determined?
The angles are determined by the molecular geometry. To obtain the bond angle, you would refer to one terminal atom - central atom - another terminal atom. So for your example, you would be considering H-C-H angle. The values for the bond angle arises from geometry.
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