Chemistry / Chem 1043 · Atom · ~20 seconds
Two-Domain Geometry: Linear
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A central atom with two electron domains and no lone pairs adopts a linear electron-pair and molecular geometry, a 180° bond angle.
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Beryllium fluoride, BeF2, with two bonding domains and no lone pairs on beryllium, is linear.
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Linear geometry from two domains requires zero lone pairs on the central atom — a lone pair would change the count.
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