Question

What is allotropy according to NCERT
​

Answer 1

Explanation:

the existence of two or more different physical forms of a chemical element.

Answer 2

$\sf \huge \underline{answer} \implies$

➢ Allotropy, the existence of a chemical element in two or more forms, which may differ in the arrangement of atoms in crystalline solids or in the occurrence of molecules that contain different numbers of atoms.