Chemistry · Periodic Classification Of Properties · NEET
No, but they move together. Electronegativity is a number (the pull on shared electrons). Non-metallic character is a general property (tendency to gain electrons and form negative ions). A higher electronegativity value tells you the element is more non-metallic. So they are linked but not identical: one is a measured value, the other is the behaviour it causes.
It increases from left to right across a period. As you go across, effective nuclear charge (Zeff) rises and atomic size shrinks, so the atom pulls electrons harder. Electronegativity goes up, and non-metallic character goes up with it. That is why metals sit on the left and non-metals sit on the right.
It decreases down a group. Going down, extra shells make the atom bigger and shielding increases, so the nucleus pulls shared electrons weakly. Electronegativity falls, so non-metallic character falls too. This is why the top-right element of a period family is the most non-metallic and the bottom is more metallic.
Fluorine has the highest electronegativity of all elements (4.0 on the Pauling scale). It is small and has a high Zeff, so it pulls shared electrons very hard. That strong pull is exactly what non-metallic character means, so fluorine is the most non-metallic (and most reactive) non-metal.
They are opposite. Metallic character means the atom easily LOSES electrons. Non-metallic character means it easily GAINS them. Since high electronegativity = strong pull to gain electrons, high electronegativity = HIGH non-metallic and LOW metallic character. That is why NEET says metallic character varies inversely with electronegativity.
Roughly yes, electronegativity is the best single guide to non-metallic character. But also check position: a right-side, top element with the same value is usually treated as the non-metal. For NEET ordering questions, sort by electronegativity value first, then use the period/group trend to break ties.
The correct order of increasing metallic character of Na, Be, P, Mg and Si is:
Arrange the following elements in increasing order of electronegativity: N, O, F, C, Si.
Try the real previous-year questions from this chapter — each with the answer and a full solution.
Fluorine. It has the highest electronegativity (4.0), so it pulls shared electrons the hardest and is the most non-metallic element in the periodic table.
Among common elements, caesium (Cs) and francium have the lowest electronegativity, so they show the highest metallic character. They lose electrons very easily.
Because effective nuclear charge increases and atomic size decreases across a period. Both make the atom pull electrons harder, raising electronegativity and therefore non-metallic character.
Yes. Sort by electronegativity: the higher value is more non-metallic (less metallic). NEET 2026 tested this directly using Na, Be, P, Mg, Si. Metallic order is just the reverse of the electronegativity order.
Yes, roughly. Metalloids like Si have middle electronegativity values, so they show partly metallic and partly non-metallic behaviour, sitting between the two extremes.
