A group 16 element exists in the monoatomic state in metallic lattice. It also exists in two crystalline forms. The metal is :

Sulphur

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Polonium

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Selenium

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Tellurium

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Solution

The correct option is B Polonium
Polonium is a radioactive element that exists in two metallic allotropes. The alpha form is the only known example of a simple cubic crystal structure.

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16

The phenomenon by which an element exists in two or more different crystalline or amorphous forms is called ___.

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