The molecular geometry around a central atom is the same as the electron group geometry when there are no lone pairs of electrons on the central atom. In such cases, all electron groups (bonding pairs) are arranged symmetrically around the atom, leading to identical geometries. This typically occurs in molecules with linear, trigonal planar, or tetrahedral arrangements, depending on the number of bonding pairs.
Check the link, it is a sheet describing the different types of electron and molecular geometry. It helped me a lot. ^^ electron pair geometry and molecular geometry won't be the same if there are lone pairs involved.
Octahedral is the edcc geometry and the molecular geometry is square pyramidal
The electron geometry of NCl3 is trigonal pyramidal (four electron groups around the central nitrogen atom). The molecular geometry of NCl3 is also trigonal pyramidal, as the three chlorine atoms and lone pair of electrons repel each other to form this shape.
There are two electron groups around the central sulfur atom in H2S. This gives H2S a bent molecular geometry.
A molecule with 6 electron domains can have a trigonal bipyramidal molecular geometry. This means there are 5 atoms or groups surrounding the central atom with bond angles of 90° and 120°.
Check the link, it is a sheet describing the different types of electron and molecular geometry. It helped me a lot. ^^ electron pair geometry and molecular geometry won't be the same if there are lone pairs involved.
electron pair geometry: octahedral molecular geometry: octahedral
check valence electron
Octahedral is the edcc geometry and the molecular geometry is square pyramidal
linear
One can predict molecular geometry by considering the number of bonding and non-bonding electron pairs around the central atom, using VSEPR theory. The arrangement of these electron pairs determines the shape of the molecule.
The electron geometry of NCl3 is trigonal pyramidal (four electron groups around the central nitrogen atom). The molecular geometry of NCl3 is also trigonal pyramidal, as the three chlorine atoms and lone pair of electrons repel each other to form this shape.
The electron domain geometry of XeF2 is linear. This is because the central atom Xe has two bonded atoms (F) and no lone pairs of electrons, resulting in a linear molecular geometry.
There are two electron groups around the central sulfur atom in H2S. This gives H2S a bent molecular geometry.
The molecular geometry of SnCl5- is square pyramidal. This is because the central tin atom has five bonding pairs and no lone pairs, leading to a trigonal bipyramidal electron geometry. The lone pair occupies one of the equatorial positions, resulting in a square pyramidal molecular geometry.
The molecular geometry of the AsO2- ion is bent (because of the lone electron pair with the central arsenic atom, making the O-As-O bond angle very obtuse) but its electron domain geometry is trigonal planar because there are three domains, with a 120 deg. angle between them.
Consider: Number of bonding domains on the central atom Number of non-bonding electron pairs (lone pairs) on the central atom