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Wednesday, October 28, 2020

Valence bond Theory (VBT)

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  VALENCE BOND THEORY (VBT) :  It was presented by Heitler & London to explain how a covalent bond is formed. It was extended by Pauling...

VSEPR theory - VALENCE SHELL ELECTRON PAIR REPULSION THEORY

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  VALENCE SHELL ELECTRON PAIR REPULSION THEORY (VSEPRT ) It was described by Sidgwick and Powel in 1940 and further developed by Gillespie...

Formal charge

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  Formal charge-  defined as the difference between the no of valence electrons of that atom in an isolated of free state and the no of elec...

KOSSEL - LEWIS APPROACH TO CHEMICAL BONDING - Octet rule

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KOSSEL - LEWIS APPROACH TO CHEMICAL BONDING (Octet rule)      ·        Every atom has a tendency to complete its octet in outermost shell ...
Tuesday, October 27, 2020

trends in ionisation enthalpy of d-block elements part- 2

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  Ionisation enthalpy-  M(g) -----> M + (g) + Δ i H (ionisation enthalpy)  ·       Ionisation potential values increase in a period fro...
Monday, October 26, 2020

Lewis symbol and rule of Lewis dot structure -why does atom combine with other atom?

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  Chemical bond-   ·        A force that acts between two or more atoms to hold them together as a stable molecule.   ·        This proc...

States of matter intermolecular forces Part -1

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  States of matter There are two types of properties shown by individual or the collection of a large number of particles A)         1)...