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Do you k now a bout the Valence Bond Theory !!! Actully this theory describes a covalent bond as the overlap of half-filled atomic orbitals (each containing a single electron) that yield a pair of electrons shared between the two bonded atoms. We say that orbitals on two different atoms overlap when a portion of one orbital and a portion of a second orbital occupy the same region of space.   According to valence bond theory, a covalent bond results when two conditions are met: (1) an orbital on one atom overlaps an orbital on a second atom   (2) the single electrons in each orbital combine to form an electron pair.   The mutual attraction between this negatively charged electron pair and the two atoms’ positively charged nuclei serves to physically link the two atoms through a force we define as a covalent bond. The strength of a covalent bond depends on the extent of overlap of the orbitals involved. Orbitals that overlap extensively form bonds that are st...

Do you k now a bout the calorimetry !!!   One technique we can use to measure the amount of heat involved in a chemical or physical process is known as calorimetry .   Calorimetry is basically used to measure amounts of heat transferred to or from a substance. To do so, the heat is exchanged with a Calorimeter. The change in temperature of the measuring part of the calorimeter is converted into the amount of heat.                           A calorimeter is a device used to measure the amount of heat involved in a chemical or physical process. For example, when an exothermic reaction occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution, which increases its temperature. When an endothermic reaction occurs, the heat required is absorbed from the thermal energy of the solution, which decreases its temperature.   If you wa n t to joi n us, you ca n ...

Do you k now !!!   The word Science originates from the Latin verb Scientia meaning ‘ to know ’ . Science, in a broad sense, is as old as human species. The early civilisations of Egypt, India, China, Greece, Mesopotamia and many others made vital contributions to its progress. From the sixteenth century onwards, great strides were made in science in Europe. By the middle of the twentieth century, science had become a truly international enterprise, with many cultures and countries contributing to its rapid growth.   We will update Facts, Su bjects topics, Q & A Sessions, Classroom videos on this page.  Like and Share this page to more and more friends & students. & yes of course Stay Safe... Stay Healthy... Stay Connected.