there is repulsion between lone pair and bond pair for example in water molecule oxygen has lone pair which repells the bond pair due to this bond angle decreases simply ddue to repulsion btween lone pair to lone pair or lone pair to bond pair angle varies
The bond angle formed by an axial atom, the central atom, and an equatorial atom in a trigonal bipyramidal molecular geometry is approximately 90 degrees.
By forming chemical bonds with two hydrogen atoms and a carbon atom, the nitrogen atom now the R group, and the hydrogen atom are all bonded to a central carbon atom (circled). They include alanine, valine, leucine and isoleucine.
The angle between two terminal atoms and the central atom in a molecule depends on its molecular geometry. For example, in a trigonal planar geometry, the angle is 120 degrees, while in a tetrahedral geometry, the angle is 109.5 degrees. These angles are determined by the electron repulsion between the bonding and non-bonding pairs around the central atom.
The central atom in CH4 is carbon, which has four bonding groups. Each bonding group is a hydrogen atom bonded to the central carbon atom.
Amino acids do not have a central atom. They are organic compounds composed of carbon, hydrogen, oxygen, and nitrogen atoms, with some also containing sulfur. The central atom concept is more commonly associated with molecules of inorganic compounds.
An amino group and an R group
The bond angle formed by an axial atom, the central atom, and an equatorial atom in a trigonal bipyramidal molecular geometry is approximately 90 degrees.
In an amino acid, the central carbon atom is attached to an amino group, a carboxyl group, a hydrogen atom, and an R group (side chain). Therefore, the central carbon atom is not attached to a phosphate group in an amino acid.
By forming chemical bonds with two hydrogen atoms and a carbon atom, the nitrogen atom now the R group, and the hydrogen atom are all bonded to a central carbon atom (circled). They include alanine, valine, leucine and isoleucine.
The four groups that surround the central carbon atom in an amino acid are the amino group (NH2), the carboxyl group (COOH), a hydrogen atom (H), and an R-group (side chain) that varies among different amino acids.
The angle between two terminal atoms and the central atom in a molecule depends on its molecular geometry. For example, in a trigonal planar geometry, the angle is 120 degrees, while in a tetrahedral geometry, the angle is 109.5 degrees. These angles are determined by the electron repulsion between the bonding and non-bonding pairs around the central atom.
An amino group and an R group
The central atom in CH4 is carbon, which has four bonding groups. Each bonding group is a hydrogen atom bonded to the central carbon atom.
It depends on the hybridization of the central atom.
a central carbon, a hydrogen atom, an amino group, and a carboxyl group
Amino acids do not have a central atom. They are organic compounds composed of carbon, hydrogen, oxygen, and nitrogen atoms, with some also containing sulfur. The central atom concept is more commonly associated with molecules of inorganic compounds.
A charged atom or group of atoms are known as ions or radicals.