As we go down the period the electronegativity decreases. But after Al, due to the presence of d electrons which have minimum shielding effect, the nuclear charge increases and hence electronegativity also increases.
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STRUCTURE OF FULLERENCES :
(1) A fascinating discovery was the synthesis of spherical carbon-cage molecules called fullerences. The discovery of fullerene was awarde...
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Bleaching powder is not a true compound but it is a mixed salt of calcium hypochlorite [Ca (OCl) 2 ].3H 2 O and basic calcium chloride [C... -
The structure of crystalline solids is determined by packing of their constituents .In order to understand the packing of the constituen... -
(1) Back bonding is a type of weaker π bond which is formed by sideways overlapping of filled orbital with empty orbital present on adjace... -
Phosphorous is a pentavalent element hence show +3 and +5 oxidation state (d orbital presence).it form two oxide P 2 O 3 (+3) and P 2 O 5... -
We know that the Ligands which cause large degree of crystal filed splitting are termed as strong field ligands. and Ligands that cause onl... -
(1) Oleum can be represented by the formula ySO 3 .H 2 O where y is the total molar sulphur trioxide content .the value of y can be va... -
Pyrrole, furan and thiophene undergo electrophilic substitution reactions like nitration, sulphonation, halogenation etc. characteristic ... -
In case of Pyrrole the lone pair electrons of the nitrogen atom is involved in conjugated system of pi electrons of five membered ring ... -
[FeF 6 ] 3- is a Fe (III) complex hence [Ar] 3d 5 . F - is a weak field ligand and the complex is high spin: ... -
Tetahedral complex (sp 3 ): In a tetrahedral field : Consider a cube such that a metal atom or ion is situated at its centre of symmetry ...
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