Question

1. Select the appropriate options and complete the following paragraph.

( amorphous, crystalline , three , four, six , diamond, graphite , fullerene)

Allotropy is the phenomenon in which an element in different physical forms

having different physical properties but similar chemical properties. Carbon

occurs in several allotropic forms. Diamond , Graphite and Fullerene are ------

-- allotropes of carbon. In --------, each carbon atom is bonded to -----------

neighbouring atoms by covalent bonds forming a tetragonal three

dimensional structure. In ------------, each carbon atom is bonded to --------

neighbouring atoms by covalent bonds forming a hexagonal layered

structure. -------- molecules are found in the form of buckyballs and

buckytubes.​

Answer 1

Diamond, Graphite and Fullerene are crystalline allotropes of carbon.

In diamond, each carbon atom is bonded to four neighbouring atoms by covalent bonds forming a tetragonal three dimensional structure.

In graphite, each carbon atom is bonded to three neighbouring atoms by covalent bonds forming a hexagonal layered structure.

Fullerene molecules are found in the form of buckyballs and buckytubes.

~sylvia