The structure of diborane (B2H6) contains
four 2C-2e- bonds and four 3C-2e- bonds
two 2C-2e- bonds and two 3C-3e- bonds
two 2C-2e- bonds and four 3C-2e- bonds
four 2C-2e- bonds and two 3C-2e- bonds
In silica (SiO2), each silicon atom is bonded to
two oxygen atoms
four oxygen atoms
one silicon and two oxygen atoms
one silicon and four oxygen atoms