Electron Dot Structures and VSEPR Theory

Which statement best describes the Valence Shell Electron Pair Repulsion (VSEPR) theory?

• It predicts bond energies by comparing electronegativity differences.

• It models molecular shape based on electron pairs arranging to minimize repulsion.

• It explains periodic trends by counting core electrons.

• It determines reaction rates from collision frequency.

According to the provided definitions, what is molecular geometry?

• The number of valence electrons on an atom.

• The three-dimensional shape of a covalent molecule determined by shared and unshared valence electron pairs.

• The arrangement of atoms in a crystal lattice.

• The order in which atoms bond during a reaction.

Which description correctly identifies a lone pair in the context of VSEPR?

• Two valence electrons on a single atom that are not shared in a bond.

• A single electron participating in a triple bond.

• Two core electrons that determine atomic radius.

• A pair of electrons delocalized across a metallic lattice.

When drawing a Lewis (electron dot) structure, how are shared/bonded valence electrons typically shown?

• As dots near each nucleus.

• As lines between symbols representing bonds.

• As arrows indicating electron flow.

• As numbers next to element symbols.

In Lewis dot structures, how are lone pairs of valence electrons represented?

• As lines connecting atoms.

• As dots placed on the atom.

• As shaded regions around the molecule.

• As wedges and dashes indicating 3D orientation.

Which combination of central atom features can result in a linear molecular geometry according to the section?

• Central atom with 0 lone pairs bonded to 2 atoms.

• Central atom with 1 lone pair bonded to 3 atoms.

• Central atom with 2 lone pairs bonded to 4 atoms.

• Central atom with 0 lone pairs bonded to 3 atoms.

Which statement matches the bent molecular geometry conditions provided?

• Central atom with 0 lone pairs; bonded to 4 atoms.

• Central atom with 1 or 2 lone pairs; bonded to 2 atoms.

• Central atom with 0 lone pairs; bonded to 2 atoms.

• Central atom with 1 lone pair; bonded to 3 atoms.

For trigonal planar molecular geometry, which description is correct?

• Central atom with 0 lone pairs; bonded to 2 atoms.

• Central atom with 0 lone pairs; bonded to 3 atoms.

• Central atom with 1 lone pair; bonded to 3 atoms.

• Central atom with 0 lone pairs; bonded to 4 atoms.

Which condition defines trigonal pyramidal molecular geometry in this section?

• Central atom with 1 lone pair; bonded to 3 atoms.

• Central atom with 0 lone pairs; bonded to 3 atoms.

• Central atom with 2 lone pairs; bonded to 2 atoms.

• Central atom with 0 lone pairs; bonded to 4 atoms.

Which description identifies tetrahedral molecular geometry as stated?

• Central atom with 0 lone pairs; bonded to 4 atoms.

• Central atom with 1 lone pair; bonded to 3 atoms.

• Central atom with 0 lone pairs; bonded to 3 atoms.

• Central atom with 2 lone pairs; bonded to 2 atoms.