Chemical Bonding

A molecule with a lone pair on the central atom would have the same electron and molecular geometry True False What molecular geometry would PH3 have? Trigonal Pyramidal Trigonal Bipyramidal Bent Linear According to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible? Pairs of valence electrons Mobile Electrons Inner shell electrons Electrons closest to the nucleus Which shapes are altered due to unshared pairs of electrons? Tetrahedral and Bipyramidal Trigonal Planar and Bent Pyramidal and Linear Bent and Pyramidal Which of the following images represents a Trigonal Planar molecular geometry? The polarity of a bond between two elements can be best determined by The difference in first ionization energy between the elements The difference in atomic radius between the elements The number of electrons shared in the bond The difference in electronegativity between the elements Which of the following molecules has Π bonds? CO2 NH3 BF3 H2O Which statement is TRUE, based on the diagram provided? atomic orbital overlap to produce sigma bond s orbital overlap with s orbital to produce sigma bond s orbital overlap with s to produce π bond p orbital overlap with s to produce π bond Diagram show Beryllium atom undergoing hybridization to form BeCI BeCI2 BeCI3 BeCI4 Carbon atom mark as red in the given molecule undergoes sp hybridization sp2 hybridization sp3 hybridization d2sp3 hybridization Hybridization of nitrogen in the given molecule is sp2 sp3 with one lone pair sp3 with zero lone pair sp Will this molecule be polar or nonpolar? Polar Non-Polar What are the hybridization and the approximate bond angles in CS2? sp2, 1070 sp3, 1200 sp, 1800 sp2, 1200 Which of the following statements is true? Electrons are never found in an antibonding MO. All antibonding MOs are higher in energy than the atomic orbitals of which they are composed. Antibonding MOs have electron density mainly outside the space between the two nuclei. None of the statements is true Two of the statements are true. When comparing Be2and H2:I.Be2is more stable because it contains both bonding and antibonding valence electrons.II.H2has a higher bond order than Be2.III.H2is more stable because it only contains σ1s electrons.IV.H2 is more stable because it is diamagnetic, whereas Be2 is paramagnetic. I, II II, III II only II, IV If a molecule demonstrates paramagnetism, then :I. The substance can have both paired and unpaired electrons.II. The bond order is not a whole number.III. It can be determined by drawing a Lewis structure.IV. It must be an ion. I, II I, II I only III only Which of the following: F2, B2, O2, N2 , are paramagnetic? O2 only O2 and N2 O2 and F2 O2 and B2 A π (pi) bond is the result of the overlap of two s orbitals overlap of two p orbitals along their axes sidewise overlap of two s orbitals sidewise overlap of two parallel p orbitals Which of the following molecules contains the shortest C–C bond? C2H2 C2H4 C2H6 C2Cl4