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Q. The physical properties of group-$16$ elements are
I. polonium is a metal and is radioactive.
II. all these elements exhibit allotropy.
III. with increase in atomic number, the melting and boiling points increase down the group.
The option with correct set of properties is

The p-Block Elements - Part2

Solution:

Oxygen and sulphur are non-metals, selenium and tellurium are metalloids, whereas polonium is a radioactive element. It is short lived (half-life $13.8$ days).
All these elements exhibit allotropy. The melting and boiling points increase with an increase in atomic number down the group.