Two molecules have the same molecular geometry but different electron domain geometries. which combination of atoms and lone pairs around the central atom could describe these molecules? 2 atoms and 2 lone pairs; 3 atoms and 0 lone pairs 1 atom and 3 lone pairs; 2 atoms and 1 lone pair 3 atoms and 1 lone pair; 3 atoms and 0 lone pairs 2 atoms and 2 lone pairs; 2 atoms and 1 lone pair

Answer : The correct option is, 2 atoms and 2 lone pairs; 2 atoms and 1 lone pair

Explanation :

In type , when bond pair of electrons is 2 and lone pair of electrons is 1 then the electron domain geometry is Trigonal planar and molecular geometry is Bent.

In type , when bond pair of electrons is 2 and lone pair of electrons is 2 then the electron domain geometry is Tetrahedral and molecular geometry is Bent.

Hence, a molecule having 2 atoms and 2 lone pair have the same molecular geometry as that of the molecule having 2 atoms and 1 lone pair.

The table is shown below.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.