According to VSEPR theory, if there are five electron domains in the valence shell of an atom (one of which are lone pairs), they will be arranged in a(n) electron domain geometry and aln) molecular geometry. O tetrahedral; tetrahedral O trigonal bipyramidal; trigonal bipyramidal O trigonal bipyramidal; T-shaped O trigonal bipyramidal; seesaw (saw horse)

How does a trigonal pyramid differ from a tetrahedron so far as molecular geometry is concerned?

What is the molecular geometry of SF6 O trigonal planar O trigonal bipyramidal Octahydral

Which electron-pair geometry corresponds to a steric number of 5? O octahedral O trigonal bipyramidal O trigonal planar O linear O tetrahedral

VSEPR Geometry and Molecular Geometry of CO2

True or false The F – N – F bond angle in NF3 is smaller than the H – N – H bond angle in NH3.

Which statements accurately describe sigma bonds?   Sigma bonds can only result from the overlap of two p orbitals. Sigma bonds only form when regions of orbitals with different signs overlap. Sigma bonds are symmetric about the internuclear axis. Sigma bonds result from the overlap of orbitals in only one region of space. Sigma bonds result from the overlap of orbitals in two regions of space. Sigma bonds cannot rotate without interfering with orbital overlap. A sigma bond could result from the sideways (as opposed to head-on) overlap of two p orbitals. Sigma bonds only form when regions of orbitals with the same sign overlap.

What are the angles a and b in the actual molecule of which this is a Lewis structure? H H H C H a a = C b = ⁰ C H Note for advanced students: give the ideal angles, and don't worry about small differences from the ideal that might be caused by the fact that different electron groups may have slightly different sizes. H X

five electron groups around the central Se atom. There are bent The electron-group geometry is linear The number of atoms attached to the central Se atom is trigonal pyramidal tetrahedral The shape of the molecule is four two three trigonal planar six ious