Flashcard - Ch. 8 - Bonding Theories and VSEPR

Front

What is the VSEPR theory and what does it predict?

Back

VSEPR (Valence Shell Electron Pair Repulsion) theory predicts the shape of molecules based on the repulsion between electron pairs in the valence shell of the central atom.

Front

What molecular shape is associated with the formula AX₂?

Back

The molecular shape associated with the formula AX₂ is linear.

Front

How many unshared pairs of electrons are typically found in a bent molecular shape?

Back

A bent molecular shape typically has 1 or 2 unshared pairs of electrons.

Front

What is the molecular shape of SeF₆?

Back

The molecular shape of SeF₆ is octahedral.

Front

What does the notation AX₃E₂ represent in VSEPR theory?

Back

The notation AX₃E₂ represents a molecular shape with three bonded atoms and two lone pairs of electrons, resulting in a trigonal bipyramidal shape.

Front

Which molecular shape is characterized by having unshared pairs of electrons on the central atom?

Back

The bent molecular shape is characterized by having unshared pairs of electrons on the central atom.

Front

What is the molecular geometry of a molecule with the formula AX₄?

Back

The molecular geometry of a molecule with the formula AX₄ is tetrahedral.

Front

What is the significance of lone pairs in determining molecular shape?

Back

Lone pairs of electrons occupy space and repel bonded pairs, affecting the overall geometry of the molecule.

Front

What is the molecular shape of a molecule with the formula AX₅?

Back

The molecular shape of a molecule with the formula AX₅ is trigonal bipyramidal.

Front

How does the presence of lone pairs affect bond angles in a molecule?

Back

The presence of lone pairs typically decreases bond angles between bonded atoms due to increased repulsion.