What is allotropy ? Mention about the allotropic forms of Pb, Ge , Si.

1.	What is allotropy ? Mention about the allotropic forms of Pb, Ge , Si.
Answer» Solution :Allotropy : The existence of the same element in two or more FORMS in the same physical state but having different PROPERTIES is called allotropy. The different forms are called allotropes. PB: `to` No allotrope exists. Ge : `to` Two ( Both are crystalline forms ) Si : `to` Two ( Both are crystalline forms )

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