Respuesta :

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Answer:

Trigonal planar, square planar, bent, and T-shaped

Explanation:

The answer comes from VSEPR theory.

The molecules with a planar shape are those with general formula AX₃, AX₂E₂, AX₃E₂, and AX₄E₂, where A is the central atom, X are the directly attached atoms, and E are lone pairs.

Here are some examples.

AX₃ molecules

AX₃ molecules have three bonding pairs and no lone pairs.

An example is BF₃.

Its molecular shape is trigonal planar.

AX₂E₂ Molecules

AX₂E₂ molecules have two bonding pairs and two lone pairs.

An example is H₂O.

The electron geometry is tetrahedral.

However, we do not count the lone pairs in determining the molecular shape, so the molecule is bent.

AX₃E₂ molecules

AX₃E₂ molecules have three bonding pairs and no lone pairs.

An example is ClF₃.

The electron geometry is trigonal bipyramidal.

The molecule is T-shaped.

AX₄E₂ molecules

AX₄E₂ molecules have three bonding pairs and no lone pairs.

An example is XeF₄.

The electron geometry is octahedral.

The molecule is square planar.

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Universidad de Mexico