Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) Boron exist in two allotropic forms called amorphous and crystalline forms. Amorphous boron is a brown powder of specific gravity 2.34. The crystalline boron exists in several different modification. The structure of crystalline boron is - Sarthaks eConnect

Boron exist in two allotropic forms called amorphous and crystalline forms. Amorphous boron is a brown powder of specific gravity 2.34. The crystalline boron exists in several different modification. The structure of crystalline boron is

Boron exist in two allotropic forms called amorphous and crystalline forms. Amorphous boron is a brown powder of specific gravity 2.34. The crystalline boron exists in several different modification. The structure of crystalline boron is

A.

icosahedron

B.

tetrahedron

C.

octahedron

D.

pentagonal bipyramidal