Bond angles summary

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Name: Planar

Angle: 180o

Bonding pairs: 2

Lone pairs: 0

Atoms in molecule: 3

Reason: There are 2 bonding pairs and no lone pairs of electrons. The bond angles repel each other so that they are the maximum distance apart, with the smallest repulsion possible.

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Name: Trigonal planar

Angle: 120o

Bonding pairs: 3

Lone pairs: 0

Atoms in molecule: 4

Reason: There are 3 bonding pairs and no lone pairs of electrons. The bond angles repel each other so that they are the maximum distance apart, with the smallest repulsion possible.

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Name: Tetrahedral 

Angle: 109.5o

Bonding pairs: 4

Lone pairs: 0

Atoms in molecule: 5

Reason: There are 4 bonding pairs and no lone pairs of electrons. The bond angles repel each other so that they

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