Monday, April 7, 2014

Edutainment : Single Displacement Reaction By Cartoon Dance

Representation of Single Replacement Reaction by Cartoon Dance

The displacement reaction is a type of REDOX reacn. In these reactions, the more reactive element replaces the less reactive one from it's compound. As for example, more reactive Zn replaces less reactive Cu
from CuSO4 & more reactive non-metal Cl replaces less reactive
non-metal I from KI.

                 Zn   +  CuSO4    =    ZnSO4  +  Cu

                 Cl2  +  2 KI      =    2 KCl   +  I2



Thursday, July 11, 2013

Valence

Valence and Hybridization :
                   The electronic configuration of carbon indicates its valence should be 2 ; but
 actually it is 4.How is it happen ? It is explained lucidly in the following animation. Also the
 formation of sigma- and pie-covalent bonds by overlapping of atomic orbitals and hybrid
orbitals are shown in the video.
                  In ground state the carbon atom has 2 unpaired electrons, so it should have
valence 2. But on taking 96 kcal/mol energy, one of the 2s-electrons excited to 2p-energy
state prior to bond formation. This energy is compensated by the energy evolved by the
 formation of four covalent bonds (about 100x4= 400 kcal/mol). As the resultant four bonds
are equivalent, the one 2s and the three 2p orbitals of carbon atom hybridizes to yield four
equivalent sp^3 orbitals.



Tuesday, July 9, 2013

Atomic Structure of Hydrogen, Deuterium & Anti-hydrogen

 Class IX & X :  In this video, mass & charge of sub-atomic particles and the structure of hydrogen & Deuterium are shown. This animation also contains the structure of anti-matter of hydrogen i.e.,anti-Hydrogen.

Saturday, July 6, 2013

Atomic Structure of Carbon on the Basis of Bohr-Sommerfeld Theory


          Bohr's orbit,sommerfeld modification and then sub-sub-level electronic configuration were animated in this video.




Tuesday, July 2, 2013

100 years anniversary of Bohr's Atom - still now relevant...

Bohr Atomic Model successfully explained the Rydberg formula about the line spectrum of H-atom and H-like ion. In this video I tried to exhibit briefly the Bohr's idea.