The answer is 1.
This is because the only atom with lone paires is phosphorus and it only has 1.
Phosphorus typically forms bonds with up to five other atoms or groups, giving it a bonding capacity of five. This allows phosphorus to form a variety of compounds with different elements and functional groups.
The VSEPR formulas that predict a trigonal bipyramidal shape are AX₅ and AX₄E. In both cases, there are five electron groups around the central atom, leading to a trigonal bipyramidal geometry with angles of 90° and 120°.
APEX minimizes the repulsion of electron groups
3 electron groups classified as trigonal planar. The molecular geometry is Angular or Bent whichever you prefer to call the shape. The ideal bond angles are 120 degrees and the molecule is polar.
A phosphorus atom surrounded by four oxygen atoms is commonly found in phosphate groups, which are important components of DNA, RNA, ATP, and other biological molecules. These phosphate groups play a crucial role in energy transfer, cellular signaling, and structural stability in living organisms.
linear
There are two electron groups around the central sulfur atom in H2S. This gives H2S a bent molecular geometry.
The spatial arrangement of electron groups around the central atom is called molecular geometry. It describes the three-dimensional arrangement of atoms in a molecule.
2 electron groups are in CO2. Proof, I got it wrong on a quiz. :(
The electron geometry is tetrahedral when there are 4 electron groups around the central atom. This means the electron groups are arranged in a 3D shape resembling a pyramid with a triangular base.
electron-group geometry
three dimensional arrangement of atoms electron-group geometry
trigonal pyramidal
If there are only three electron groups around an atom, they would be arranged in a trigonal planar geometry. This arrangement minimizes repulsion between the electron groups, placing them 120 degrees apart in a flat plane. The central atom would have a bond angle of approximately 120 degrees between the electron groups. If one of the groups is a lone pair, the geometry would adjust to a trigonal pyramidal shape.
In VSEPR theory, electron groups (bonding pairs and lone pairs) around a central atom arrange themselves in a way that minimizes repulsion, resulting in various molecular geometries such as linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral. The number of electron groups around the central atom determines the molecular geometry.
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.
10 because there are 20 Valence Electrons that are pairing up.