Question

Name all the molecular shapes that have a tetrahedral electron-group arrangement.

Short answer

The shapes that have a tetrahedral electron group arrangement are Tetrahedral, Trigonal planar, Bent shape.

Step-by-step solution

Valence shell electron-pair repulsion theory

According to this theory, the formation of the shape of a molecule can be determined easily by the electron present in the valence shell but the shape changes because of the presence of the electron itself. As electron can exist in the form of lone pair, electron pair, single electron, and double-triple bond. There is the presence of repulsion between electron-electron, lone pair-bond pair, and bond pair-bond pair which change the shape of the molecule.

The octet rule may be defined as the maximum of 8 electrons that can be filled in an orbital of an atom. It can be completed by sharing or giving the electrons to become stable.

Structure Explanation

In the geometry of the molecule, all the bond pairs and lone pairs are involved in the molecule whereas in the shape of the molecule only the bond pair is involved. The molecular shape which can have tetrahedral geometry can be tetrahedral, Trigonal planar, or bent shape. The tetrahedral involves the 4 bond pair in its geometry.

For Example, Nitrous oxide, and Boron hydride.