Chapter 9 Bonding and Molecular Structure: Orbital Hybridization and Molecular Orbitals - Study Questions - Page 369f: 60

See the answer below.

a) Boron has 3 valence electrons, fluorine 7 and with the negative charge, 32 in total, which is isoelectronic to, for example, $CF_4$ b) No, sulfur has six valence electrons while silicon has four. c) $sp^3$ in both cases, because they make 4 single bonds.