Question

For a molecule with the formula AB2, the molecular shape is ________. For a molecule with the formula AB2, the molecular shape is ________. linear or T-shaped trigonal planar linear or bent linear or trigonal planar T-shaped

Answer 1

Answer:

linear or trigonal planar

Explanation:

The molecular formula AB$_{2}$ have the following criteria:

A= the central atom

B= directly bonded atoms.

In Molecular Geometry, Molecular Formula AB$_{2}$ can either be Linear or Trigonal Planar.

In linear geometry, they are formed as a result of Sp hybridised orbital. Sp hybridised orbital involves blending of one s-orbital and one p-orbital to produce a hybrid orbital directed along a straight line, therefore making it linear $(180^{0} )$ e.g CO$_{2}$ , HCN etc.

In Trigonal Planar, they are formed as a result of Sp$^{2}$ hybridised orbital. Sp$^{2}$ hybridised orbital are formed by mixing of one s-orbital and two p-orbitals to produce orbitals which are coplanar and the lobes directed towards the corners of an equilateral triangle. (Trigonal Planar) e.g BF$_{2}$ , $CO_{3} ^{-2}$ , SO$_{2}$ etc.