Question

choose the name of the molecular geometry for each molecule described below. a molecule with two atoms and no lone pairs around the central atom has a shape. a molecule with four atoms and no lone pairs around the central atom has a shape. a molecule that has two atoms and two lone pairs around the central atom has a shape. a molecule that has five atoms and no lone pairs around the central atom has a shape.

Explanation:

Step1: Recall molecular geometry rules

For a molecule with two atoms and no lone - pairs around the central atom, the bond angle is 180 degrees and the shape is linear.

Step2: Analyze four - atom case

A molecule with four atoms and no lone - pairs around the central atom has a tetrahedral shape as the atoms are arranged at the vertices of a tetrahedron to minimize repulsion.

Step3: Consider two - atom and two - lone - pair case

A molecule with two atoms and two lone - pairs around the central atom has a bent shape due to the repulsion between the lone - pairs and bonding pairs.

Step4: Examine five - atom case

A molecule with five atoms and no lone - pairs around the central atom has a trigonal - bipyramidal shape where three atoms are in a trigonal planar arrangement in one plane and two atoms are above and below this plane.

Answer:

1. linear
2. tetrahedral
3. bent
4. trigonal - bipyramidal