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Elements of Group 1 & 2 


Chemical Equilibrium 

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Alkali metals and Alkaline Earth metal

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 The elements in periodic table in which last electron enters in 'S'  orbital of valance shell  are called as 'S'  block elements As this block accommodate only 2 electrons, there are total 2 groups, group first and second belong to the  S  block of periodic table.  Group first elements are called as alkali metals while group second elements are called as alkaline         earth metal except beryllium because their  oxides and  hydroxides are alkaline in nature and they found in earth crust                                               The Electronic configuration of group 1 elements                                            The Electronic configuration...
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Properties of Dihydrogen

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 Properties of dihydrogen Physical properties : Dihydrogen is colorless, tasteless and odorless gas.  It burns with a pale blue flame. It is a nonpolar water insoluble gas,  lighter than air. Chemical properties :  i. Reaction with metals :     Dihydrogen react with all reactive metal  including alkali metals, calcium, barium at high temperature                                                          ii. Reaction with dioxygen :     Dihydrogen react with Dioxygen to form water in presence of catalyst. This Exothermic reaction  iii. Reaction with halogen :     Hydrogen  react with halogen to  form hydrogen  halides (X= F, Cl, Br, I ) iv. Reducing nature of Dihydrogen :      a) Dihydrogen reduces oxides ...
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