AP 2.7 VSPER and Hybridization

According to the VSEPR model, the progressive decrease in the bond angles in the series of molecules CH₄, NH₃, and H₂O is best accounted for by the

• increasing strength of the bonds

• increasing electronegativity of the central atom

• increasing number of unshared pairs of electrons

• decreasing repulsion between hydrogen atoms

Which of the following complete Lewis diagrams represents a molecule containing a bond angle that is closest to 120°?

• Option A diagram

• Option B diagram

• Option C diagram

• Option D diagram

A Lewis diagram for the molecule C₂H₄ is shown above. In the actual C₂H₄ molecule, the H-C-H bond angles are closest to

• 90°

• 109.5°

• 120°

• 180°

What is the approximate H—O—C bond angle in the glycinium cation?

• 180°

• 120°

• 105°

• 90°

Which of the following is true about the geometry of the glycinium cation?

• The leftmost C atom and all the atoms directly bonded to it lie in the same plane.

• Both C atoms and both O atoms lie in the same plane.

• The N—C—C bond angle is 180°.

• The geometry around the N atom is planar.

When Reaction 3 occurs, does the hybridization of the carbon atoms change?

• Yes; it changes from sp to sp².

• Yes; it changes from sp to sp³.

• Yes; it changes from sp² to sp³.

• No; it does not change.

Lewis electron-dot diagrams for CO₂ and SO₂ are given above. The molecular geometry and polarity of the two substances are

• the same because the molecular formulas are similar

• the same because C and S have similar electronegativity values

• different because the lone pair of electrons on the S atom make it the negative end of a dipole

• different because S has a greater number of electron domains (regions of electron density) surrounding it than C has

Refer to the following diatomic species. Contains 1 sigma (σ) and 2 pi (π) bonds

• B₂

• N₂

• O₂

• F₂

Refer to the following diatomic species. Has a bond order of 2

• B₂

• N₂

• O₂

• F₂

Tags

NGSS.HS-PS1-1

Refer to the following diatomic species. Has the largest bond-dissociation energy

• B₂

• N₂

• O₂

• F₂

Tags

NGSS.HS-PS1-4