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Structure of BrF3 Molecule  The central atom Br has seven electrons in the valence shell. Three of these will form electron-pair bonds with three fluorine atoms leaving behind four electrons. Thus, there are three bond pairs and two lone pairs. According to VSEPR theory, these will occupy the corners of a trigonal bipyramid. The two lone pairs will occupy the equatorial positions to minimise lone pair -lone pair and the bond pair -lone pair repulsions which are greater than the bond pair-bond pair repulsions. In addition, the axial fluorine atoms will be bent towards the equatorial fluorine in order to minimise the lone-pair lone-pair repulsions. The shape would be that of a slightly bent T.

Nomenclature      It is estimated that the number of species known and described ranges between 1.7 to 1.8 million. They are called by their local names (in regional languages),which vary from place to place and even within the same country. So there is need to standardise the naming pattern of living organisms such that a particular organism is known by the same name all over the world/universally. This process of naming of animals with a per the guide lines of the International code of zoological nomenclature (ICZN).   Binomial nomenclature (originally called binomial nomenclature) is used in naming organisms all over the world. 1. Binomial Nomenclature    Carolus Linnaeus,  a swedish botanist,  popularised the 'binomial nomenclature ' By using it in the 10th edition of his book Systema nomenclature. It is the type of nomenclature in which each organism is provided with an appropriate scientific name consisting of two components, the "binomen"....

Why Muscles breakdown due to exercise  Many of the people go for regular exercise but sometimes they feel that their muscles are paining they think this is due to over exercise but it is wrong, there are many factors for muscle paining.  1. Muscle pains in beinging of exercise  There are many people who even start exercise but all of sudden they start to do exercise, they don't even follow any guidelines by experience people. These people's body in stable state before they are going to start exercising when they start exercises their muscles are disturbed due to these disturbance some of the muscles would breakdown and some of them are replaced their positions due to this their muscles get pained.  2. Muscle pain due to over weight.  During exercises people going to lift weights in gyms or in home by any means, if they lift particular weights doesn't problem but sometimes they lift weights behind their ability it leads to severe muscle pain. If we lift weights o...