Electronegativity of Elements: It is the power to attract electrons.We know two or more atoms combine to form a molecule.The atom with higher electronegativity has the tendency to attract shared pair of electrons towards itself.
To define with how much power it will attract, the term electronegativity used. It has no specific units.Also, its value is not constant. It simply depends upon the nature of atom with which a particular atom is linked.
There was various scientist explain electronegativity with different scale of comparison. Out of these Pauling scales is the most commonly used. The electronegativity of the Representative elements belongs to s and p block.
From the above, it is clear electronegativity of elements increases along the group and decreases down the group.
Which element has the most electronegative?
Which element has the minimum electronegativity?
Trend in Electronegativity of Elements
Electronegativity is inversely proportional to the atom radius. Atomic radius will increase down to group and decreases along period.It means electronegativity (power to attract) decrease down to group and increase along period.
Period (Left To Right)
1.Effective nuclear charge(protons), ionization potential, electronegativity, electron affinity increases of an element.
2.Atomic radius, metallic character and electropositive character decreases of an element.
Group (Top To Bottom)
- Atomic size, electropositive character, and metallic character Increases.
2. Ionization energy, electron affinity, and electronegativity of elements decreases.
Bond Polarity With Electronegativity of Elements
- The difference lie between zero to 0.4 then, the bond is a purely covalent bond.
- if it lies between 0.4 to 2.0 then, the bond is a covalent bond(unequal share electrons).
- The difference lie between 2.0 to 4.0 then, the bond is Ionic Bond.
Factors affecting Electronegativity of Elements
- Atomic radius
- Nuclear attraction
- Oxidation state
- Percentage s –character(s –character increases, electronegativity also increases).
Applications of electronegativity
- Metallic and non-metallic character
- Bond energy
- Bond length
Electronegative values of elements
This is whole about the article Electronegativity of Elements.