Question

Explain the following properties of group 16 elements:(i) Electro negativity(ii) Melting and boiling points(iii) Metallic character(iv) Allotropy

Solution

i) Electronegativity The electronegativity decreases as we move down the group. Therefore it decreases as we move from oxygen to polonium due to an increase in nuclear sizeii) melting & Boiling pointsAs the atomic size increases from oxygen to tellurium, the melting & boiling point also increase iii) metallic character metallic properties increase down the group. this is because $$e^\theta$$becomes easier to lose as atomic radius increase. oxygen & sulphur (Nonmetal).se& tellurium (metalloids) & polonium (metal)(iv) Allotropy: Each one of the element of group 16 show allotropy oxygen has two allotropes 1) oxygen 2) ozoneSulphur exists 1) Rhombic  sulphur 2) monoclinic sulphurselenium & Tellurium in both amorphous & crystalline forms Chemistry

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