Question

which of the following is most non metallic element?
1. Br,
2.CL,
3. S,
4. P
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Answer 1

The most non-metallic element among the following is:

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ANSWER

Electronegativity is a measure of the attraction of an atom for the electrons in a chemical bond. The higher the electronegativity of an atom, the greater its attraction for bonding electrons. Electronegativity is related to ionization energy. Electrons with low ionization energies have low electronegativities because their nuclei do not exert a strong attractive force on electrons. Elements with high ionization energies have high electronegativities due to the strong pull exerted on electrons by the nucleus. In a group, the electronegativity decreases as atomic number increases, as a result of the increased

distance between the valence electron and nucleus (greater atomic radius). An example of an electropositive (i.e., low electronegativity) element is cesium; an example of a highly electronegative element is fluorine.

So as we move down the group, tendency to lose electron increases and metallic character increases while as we move across a period, electronegativity increases so nonmetallic character increases.

So among these Cl have highest non-metallic character.

Ar is a noble gas.

so cl is the answer

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