Electropositive character and electronegativity.
electropositive or metallic character-
the components which tend to shape cation by losing of electron are called electropositive component or metal
here is the electropositive character more metallic is the component
the inclination of a component to lose electron is firmly identified with the ionization energy of the component the more modest the IE the more prominent will be the propensity to lose electron and the more noteworthy will be its metallic character
as the metallic nature expands the lessening idea of component additionally builds this is the motivation behind why metals at as diminishing specialist
Periodic variation of electropositive character
the electropositive character diminishes from left to directly in a period
In a period from left to right powerful atomic charge builds this increment compelling atomic charge makes the expulsion to electron troublesome
the electropositive character increments on dropping down in the gathering
On dropping down in a gathering ionization energy diminishes so it is extremely simple for a component to frame a cation
Electronegativity
Electronegativity is defined as the tendency of the atom to attract electrons towards itself when combined in a compound
it has no unit and no dimension
electronegativity is totally different from electron affinity former is the property of bonded atom while later is the property of isolate atom
Important approaches for obtaining electronegativity value
Pauling scale-
the scale depends on energy computation and the articulation is given by
XA~XB= 0.102√Δ A-B
Or on the other hand
XA~XB= 0.208√Δ A-B
Where h a n x b are the electronegativities of an and b
Δ A-B is the reverberation energy of bond A-B
the electronegativity of chlorine on the scale is 4
Mulliken scale-
electronegativity can be viewed as the normal of the explanation energy and electron fondness of a molecule ( EN ) = IE + EA
2
IE and EA are Express in eV particle
mulliken esteem Where are about 2.8 occasions bigger than the pauling esteem
Allred rochow scale-
it is for the most part characterized as electronegativity has the alluring power among core and an electron a good ways off equivalent to covalent range on allred and rochaw scale the electronegativity is determined by applying the accompanying equation
XA= 0.744+0.359Z Effective/r2
factors influencing electronegativity -
Effective nuclear charge
higher is the successful atomic charge of a particle more if its ability to draw in shared pair of electron and accordingly more is electronegativity
screening effect
more is the screening impact created by an electron trimmer is the supplant AVG power experienced by valence electron so probability of drawing in reinforced electrons by core will be less
size of a atom
as the size of valence shell builds net atomic power on valence electron decline this does electronegativity diminishes
Oxidation state
a particle in higher Oxidation state is more electronegative has it has more successful atomic charge
Periodic variation of electronegativity
on moving from left to directly in the period electronegativity esteem increments on the grounds that nuclear size diminishes and successful atomic charge increments
on dropping down in a gathering electronegativity increments on the grounds that nuclear size increments
Important points related to electronegativity
Fluorine has the most elevated electronegativity in the occasional table
Caesium if the having least electronegativity in the occasional table
salt metal have the most reduced electronegativity in their separate period
halogen have the most noteworthy electronegativity in their particular period
electronegativity of idle gas is zero
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