【正确答案】The 14 valence electrons constitute 6 single bonds and 1 lone pair. The geometry is related to an octahedron,with an extra pair of electrons in one face center, which distorts the regularity of the symmetry. The geometry is termed "distorted octahedral. "

【正确答案】The three oxygen atoms can bond by providing an empty(sp)orbital to overlap with a filled sp³ orbital of Xe. The expected geometry is pyramidal.

【正确答案】The molecule is square planar. The 12 electrons are octahedral,with bonding pairs at the corners of the square

【正确答案】Square py ramidal. The 12 valence electrons ate at the corners of an octahedron,but one of the 6 pairs has no F atom to bond with.