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Friday, July 23, 2021

Stevenson & Schromaker Equation: Determination covalent radius of Heterogeneous Molecules.

 Stevenson & Schromaker Equation:

Covalent radius of heterogeneous molecule like A-B etc determine by Stevenson & Schromaker Equation, if atoms are formed different type of covalent bond i.e. on atom is more electronegative than the other combined atom. Then the covalent radius is calculated by the relation given by Stevenson & Schromaker, given as:

For a diatomic Hetero molecule:

Bond Length (lA-B) = r+ rB- 0.09(XA-XB)

Where XA= Electronegativity of more electronegative atom

Where XB= Electronegativity of less electronegative atom

Solved Questions:

(2) A given compound AB whose electronegative difference is 1.9 . Atomic radius of A and B are 4 and 2 Angstroms the distance between A and B means dA-B is ?

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(4) What is Mendeleev's periodic table ? give important features and draw back of Mendeleev's table.

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