This type of clothing should not be worn for parties, weddings and other formal or ceremonial events. They should not also be worn for work. Various items of clothing such as tee-shirts, denims, khakis, jackets, hoodies, mini-skirts, summer dresses, loafers, sneakers, and sandals are casual wear.
The presence of a lone pair decreases the bond angle between the bonding pair of electrons, due to their high electric charge which causes great repulsion between the electrons. They are also used in the formation of a dative bond.
But in trigonal pyramidal there is one lone pair at the central atom. â¢ The bond angle in trigonal planar is around 120 o, and in trigonal pyramidal, it is around 107 o. â¢ In trigonal planar, all the atoms are in one plane but, in trigonal pyramidal they are not in one plane.â¢ In trigonal planar, there is only bond-bond repulsion.ince the lone pair-bond repulsion is greater than the bond â bond repulsion, the bonded three atoms and the lone pair will be far apart as possible. The angle between the atoms will be less than the angle of a tetrahedron (109 o). Typically the angle in a trigonal pyramid is about 107 o.