N>P>Al>Na are the elements in decreasing order of electronegativity.
What is electronegativity ?
The propensity of an element's atom to draw a shared pair of electrons toward it in a covalent connection is known as its electronegativity.
What order do the components of electronegativity follow?
- In the periodic table, electronegativity rises from left to right across a row, as in C, N, O, and F. (Nuclear charge rises from left to right, increasing the attraction of electrons.)
- In the periodic table, electronegativity decreases as you progress down a group, for example F > Cl > Br > I (As "new shells" of electrons are formed and the nuclear charge is further insulated by the core electrons, the atomic radii rise with each group down, which reduces the attraction of electrons.)
- The most electronegative element is F.
- Li and Mg are two metals that are less electronegative than carbon (i.e. Compared to C, metals are electropositive).
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