Boron exist in different allotropic forms .All allotropic fropm contains icosahedral units (icosahedral is a regular shape with 12 corners and 20 faces ) with boron atoms at all 12 corners and all bonds are equivalent . Calculate DeltaH (n KJ) per mole of boron atoms formating gaseous icosahedron if DeltaH_(BE)(B-B)=200KJ//mol:

Boron exist in different allotropic forms .All allotropic fropm contai

1.	Boron exist in different allotropic forms .All allotropic fropm contains icosahedral units (icosahedral is a regular shape with 12 corners and 20 faces ) with boron atoms at all 12 corners and all bonds are equivalent . Calculate DeltaH (n KJ) per mole of boron atoms formating gaseous icosahedron if DeltaH_(BE)(B-B)=200KJ//mol:
Answer» 1000 600 500 250 Answer :C