what is relation between number of electron pairs and bond angle
Answers
Bond angles also play a part to give the shape of a molecule. Bond angles can be defined as the angles between the adjacent lines that represent the bond. The bond angle can help distinguish between linear, triangular planar, tetrahedral, trigonal-Bipyramidal and Octahedral. The ideal bond angles are the angles that display the maximum angle where this repulsion will be reduced, thus the VSEPR principle are confirmed.
Basically, the bond angle is representing that the electrons don't like to be near each other. Electrons are having negative charge. Two negative charges don't attract each other. Let's make an analogy. Generally, a person with negative attitude is seen as bad or mean and you do not like to talk with such a negative person. A negative person is bad enough, but if you put two together.. then It's just horrible. The two negative ones will mean towards each other and they will not like each other. So, they will be away from each other. We can apply this idea to electrons. Electrons are alike in charge and repel each other. The most distant way is through the angle they can get away from each other.
etrahedrals have a bond angle of 109.5 degrees.
H2O has a bond angle of 109.5° and CO2 would have a bond angle of 180°.