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.
The lone electron pair on nitrogen also is available for making a covalent bond in which it supplies both of the electrons. An ammonia molecule can bind another proton (H+) and become an ammonium ion, NH4+, by the reaction shown on the right.