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A central atom carries three regions of electron density and no lone pairs. The geometry and angle are:
ATetra at 109.5
BTrigonal at 120
CLinear at 180
DBent at 104
Answer & Solution
Correct answer: B. Trigonal at 120
1. Three regions spread out inside a flat plane.
2. Dividing 360 degrees equally among three gives 120 degrees each.
3. The shape is trigonal at 120 degrees.
_Source: OpenStax Chemistry 2e, Chapter 7, Chemical Bonding and Molecular Geometry._
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