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
90 degrees
sp3 bond angle is 109.5
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.
sp3d bond angle(s): 180
Bond angle, in water the H-O-H angle is 105o, in carbon dioxide O=C=O angle is 180o.
An amino group and an R group
90 degrees
The four groups that surround the central carbon atom in an amino acid are COOH group, NH2 group, H atom and R group which could either a Hydrogen atom or an alkyl group.
sp3 bond angle is 109.5
An amino group and an R group
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.
sp3d bond angle(s): 180
Bond angle, in water the H-O-H angle is 105o, in carbon dioxide O=C=O angle is 180o.
an oxygenThe central carbon atom in an amino acid is bonded to an amino functional group, a carboxyl functional group, a side chain, and hydrogen.
a central carbon, a hydrogen atom, an amino group, and a carboxyl group
A charged atom or group of atoms are known as ions or radicals.
The larger the central atom is the less the hydrogens have to spread out (because the electron repulsions are smaller) and the smaller the resulting angle.