Electronegativity is a measure up of exactly how strongly an atom – in a molecule – is may be to tempt electrons in a bond to itself.

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Factors affect electronegativity:

1) The atomic number

The atom number is the variety of protons in the cell core of an atom.It determines the chemistry properties of an element and also its ar in the regular table.The greater the atom number, the more powerful the electronegativity.


2) The atomic radius

The atom radius that a chemical facet is normally measured by the street from the facility of the nucleus come the border of the outermost class of electrons.The enlarge the atom radii, the weaker the electronegativity.


Example of atomic radius of one oxygen atom


What is electronegativity measure up in?

The most common measurement because that electronegativity is the Pauling scale, design by two-time Nobel prize winner Linus Pauling. Electronegativity scale for aspects tell how solid each element (relative to each other) can entice the bonding electron to itself. The higher the electronegativity number, the more the atom will certainly attempt to pull electrons come itself.


Why is oxygen much more electronegative than nitrogen?

Oxygen is higher in atom number

Oxygen has 8 proton in the nucleus whereas nitrogen only has 7.A bonding pair that electrons will certainly experience an ext attraction from the oxygen’s nucleus that from nitrogen’s, thus the electronegativity of oxygen is greater.


Why is sulphur much less electronegative than oxygen?

Reasons why oxygen is an ext electronegative than sulfur:

Oxygen has actually 2 energy levels, sulfur has actually 3The bonding electrons in sulfur are further away indigenous the cell core of the atomWhen bonding electron are additional from the nucleus of the atom, over there is less attraction from the nucleusthe bonding pair of electrons in oxygen will certainly experience more attraction native its nucleus than sulfur’s bonding electronsHence oxygen is a more electronegative atom

Please read up on valence electrons prior to you proceed. Valence Electrons


The smaller sized atom has a higher electronegativity

Electronegativity trends existing in the routine table


When you move throughout the routine table, the variety of protons in the nucleus increases (with no rise in energy level), thus the electronegativity increases.

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When the atom number increases down a group, over there is additionally an increase in energy levels. The atom radius is greater thus electronegativity decreases.



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