the thing that determines it is the type of molecules that are in the substance
Electronegativity of each atom is what determines the electron distribution of a bond. The electronegativity of an atom affects its distance in its valence electrons and its atomic number.
The molecule is an electron donating group.
The electron-group geometry of SeCl2 is tetrahedral. Its molecular geometry is bent. SeCl2 has one selenium atom and two chlorine atoms.
The methyl group in a molecule is electron donating.
three dimensional arrangement of atoms electron-group geometry
tetrahdral
In VSEPR theory, a double bond is treated as a single bonding group when determining the molecular geometry of a molecule. This means that a double bond does not affect the overall shape of the molecule, and is considered as one region of electron density.
The electron-group geometry of a water molecule (H₂O) is tetrahedral because it has four regions of electron density: two bonding pairs (O-H bonds) and two lone pairs of electrons on the oxygen atom. However, the presence of the two lone pairs causes repulsion that pushes the hydrogen atoms closer together, resulting in a bent molecular geometry. This deviation from the tetrahedral arrangement gives water its characteristic angle of approximately 104.5 degrees.
The presence of a phenyl group in a molecule increases its electron-withdrawing properties. This is because the phenyl group contains a delocalized pi-electron system, which can withdraw electrons from the rest of the molecule, making it more electron-deficient.
electron-group geometry
Anything with six electron groups, keep in mind an electron group is a bonded atom or an electron pair, is an octahedral. Anything in an octahedral and a lone pair is the square pyramidal geometry. So all angles between the atoms are a little less than 90 degrees and the angle of the electron pair is greater than 90.
The electron geometry around oxygen in water is tetrahedral. This is because oxygen in water has two lone pairs of electrons and forms two sigma bonds with the two hydrogen atoms, resulting in a tetrahedral arrangement of electron pairs around the oxygen atom.