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VSEPR theory: Quiz

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Question 1: For the purposes of VSEPR theory, the multiple electron pairs in a ________ are treated as though they were a single "pair".
Chemical bondAromaticityMetallic bondCovalent bond

Question 2: [4] In 1957 Ronald Gillespie and ________ at University College London refined this concept to build a more detailed theory capable of choosing between various alternative geometries.
AustraliaNew South WalesRonald Sydney NyholmBroken Hill, New South Wales

Question 3: The number of electron pairs in the valence shell of a central atom is determined by drawing the ________ of the molecule, expanded to show all lone pairs of electrons, alongside protruding and projecting bonds.
Noble gasLewis structureChemical bondOxygen

Question 4: The ________ molecule (CH4) is tetrahedral because there are four pairs of electrons.
OxygenPropaneMethaneMethanol

Question 5: ________ is another model for understanding how atoms and electrons are assembled into molecules and polyatomic ions.
Molecular orbital theoryComputational chemistryHartree–Fock methodChemical bond

Question 6: Valence shell electron pair repulsion (VSEPR) theory is a model in ________ used to predict the shape of individual molecules based upon the extent of electron-pair electrostatic repulsion.
ElectrochemistryChemistryInorganic chemistryPeriodic table

Question 7: The premise of VSEPR is that the valence electron pairs surrounding an atom mutually repel each other, and will therefore adopt an arrangement that minimizes this repulsion, thus determining the ________.
Molecular geometryChemical bondTrigonal pyramidal molecular geometryVSEPR theory

Question 8: The ________ molecule (NH3) has three pairs of electrons involved in bonding, but there is a lone pair of electrons on the nitrogen atom.
HydrogenChlorineAmmoniaOxygen

Question 9: [12][13] ________ is another theory that can often predict the geometry of coordination complexes.
Ligand field theoryCrystal field theoryLigandAmmonia

Question 10: The four hydrogen atoms are positioned at the vertices of a ________, and the bond angle is cos-1(-1/3) ≈ 109°28'.
TetrahedronDodecahedronOctahedronIcosahedron







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